Simple self-control type expansion clamp

Abstract

The utility model provides a simple self-control type expansion clamp which comprises a detection table used for placing and clamping a to-be-detected battery cell, and further comprises a driving assembly, an output control assembly and a transmission assembly which are installed and configured on the detection table, the positions of the driving assembly and the output control assembly are transversely arranged, and the transmission assembly is adopted for transmission. The space utilization rate is greatly increased, the overall occupied space is reduced, the output control assembly is made to detect and collect data through the pressure collector and the displacement sensor, meanwhile, the output control accuracy is enhanced, it is ensured that the accuracy of the data obtained after detection can be guaranteed, and all the components are compact in structure and convenient to use. The multi-channel parallel testing device has the advantages of being high in space utilization rate, capable of accurately collecting and detecting needed data, simple in structure, low in cost and capable of being applied to most scenes, especially multi-channel parallel testing scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a simple self-controlled expansion clamp. Background Art

[0002] At present, new energy vehicles are in a period of vigorous development. As the power source of new energy vehicles, power batteries have always been the focus of research in the field of new energy vehicles. During the charge and discharge cycle of lithium-ion power batteries, the electrochemical reaction inside the battery cell will cause the battery cell to expand, thereby causing the battery cell to produce a certain expansion force and expansion displacement, and the volume of the battery cell will expand in a certain proportion. This change in thickness has a very adverse effect on the life of lithium-ion power batteries. Therefore, measuring the expansion degree of the battery has become a key research topic for current battery researchers.

[0003] The automatic battery testing equipment currently on the market has high accuracy but is large in size, has low space utilization, and is more expensive. Ordinary manual testing equipment has poor working conditions, and the testing is determined by the subjective level of the experimenter, so the test results are not accurate enough.

[0004] In view of this, the applicant filed this application after studying the existing technology. Utility Model Content

[0005] The utility model provides a simple self-controlled expansion clamp, aiming to improve at least one of the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a simple self-controlled expansion clamp, including a test platform for placing the battery cell to be tested and a pressure plate arranged above the test platform for clamping the battery cell to be tested, the pressure plate is provided with a pressure collector, and also includes a drive component and a control output component installed on the bottom side of the top plate of the test platform, a transmission component is connected between the output end of the drive component and the input end of the control output component; the output end of the control output component is vertically downward and fixedly connected to the pressure plate to drive the pressure plate to approach or move away from the battery cell; the control output component is also provided with a displacement sensor for detecting the displacement of the pressure plate. By arranging the drive component and the control output component on the same side below the top plate to reduce the longitudinal space, and then connecting the two in the horizontal direction through the transmission component, the longitudinal space size is greatly saved, and at the same time, high-precision measurement can be performed through the control output component.

[0007] As a further optimization, the detection platform includes a bottom plate, a top plate and a plurality of guide pillars connected between the bottom plate and the top plate.

[0008] As a further optimization, a plurality of sliding sleeves are installed on the pressure plate, and the pressure plate is slidably connected to the guide column through the sliding sleeves.

[0009] As a further optimization, the transmission assembly is installed above the top plate, and the transmission assembly includes a driving wheel, a driven wheel and a connecting belt. The driving wheel is connected to the output end of the driving assembly, the driven wheel is connected to the input end of the control output assembly, and the connecting belt is connected between the driving wheel and the driven wheel.

[0010] As a further optimization, the transmission assembly also includes a tightening mechanism, and the tightening mechanism is arranged on one side of the connecting belt.

[0011] As a further optimization, the control output assembly includes a cylinder body, a screw, a nut and a pressing shaft, the cylinder body is installed under the top plate, the screw is rotatably set on the cylinder body, the nut is rotatably connected to the screw, and the pressing shaft is fixedly installed on the nut.

[0012] As a further optimization, a connecting plate is also included, which is installed under the pressing shaft rod, and a plurality of connecting screws are arranged on the connecting plate to fix the pressing plate.

[0013] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0014] The present application provides a simple self-controlled expansion fixture, which includes a test bench for placing and clamping a battery cell to be tested, and also includes a drive assembly, an output control assembly and a transmission assembly installed on the test bench. By arranging the positions of the drive assembly and the output control assembly horizontally and using the transmission assembly for transmission, the space utilization rate is greatly enhanced, the overall space occupied is reduced, and the output control assembly can enhance the accuracy of the control output while detecting and collecting data through a pressure collector and a displacement sensor, ensuring that the accuracy of the data obtained after detection is guaranteed. The components of the present application have a compact structure, extremely high space utilization, and can accurately collect and detect the required data. The structure is simple and the cost is low, which meets the needs of most scenarios, especially multi-channel parallel testing scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of a simple self-controlled expansion clamp of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a testing platform for a simple self-controlled expansion fixture of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the drive assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the transmission assembly structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the control output component of the utility model.

[0021] Markings in the figure: 1. Test table; 2. Guide column; 3. Bottom plate; 4. Top plate; 5. Pressure plate; 6. Sleeve; 7. Pressure collector; 8. Drive assembly; 9. Control output assembly; 10. Transmission assembly; 11. Displacement sensor; 12. Motor; 13. Reducer; 14. Cylinder; 15. Screw; 16. Nut; 17. Pressing shaft; 18. Driving wheel; 19. Driven wheel; 20. Connecting belt; 21. Tensioning mechanism; 22. Connecting plate; 23. Connecting screws. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the implementation mode of the utility model clearer, the technical scheme in the implementation mode of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation mode of the utility model. Obviously, the described implementation mode is a part of the implementation mode of the utility model, not all of the implementation modes. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the implementation mode of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected implementation mode of the utility model. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] Depend on Figures 1 to 5As shown, an embodiment of the utility model provides a simple self-controlled expansion clamp, including a test table 1 for placing a battery cell to be tested, the test table 1 includes a bottom plate 3 and a top plate 4 connected by four guide pillars 2 located at four corners, a pressing plate 5 passes through each guide pillar 2 and is slidably connected to the guide pillar 2 through a sliding sleeve 6, so as to ensure that the pressing plate 5 can be stably and horizontally clamped on the battery cell to be tested and remain parallel to the bottom plate 3, a pressure collector 7 is arranged at the center position of the pressing plate 5, and the receiving surface of the pressure collector 7 faces downward, and pressure sensing can be performed when the pressing plate 5 is clamped against the battery cell to be tested placed on the bottom plate 3. It also includes a driving component 8 and a control output component 9 installed together on the bottom side of the top plate 4. The output end of the driving component 8 and the input end of the control output component 9 are connected by a transmission component 10; the output end of the control output component 9 is vertically arranged downward to drive the pressure plate 5 to approach or move away from the battery cell, thereby clamping the battery cell. Furthermore, the control output component 9 is also provided with a displacement sensor 11 for detecting the displacement of the pressure plate 5. When the battery cell expands, the pressure collector 7 is used to receive the expansion force of the battery cell to be tested after clamping and fixing. At the same time, the pressure plate 5 can move under the drive of the expansion, and then the displacement is obtained through the displacement sensor 11.

[0024] The driving assembly 8 is a combination of a motor 12 and a reducer 13 , and the motor 12 can be a stepper motor 12 or a servo motor 12 .

[0025] Preferably, the control output assembly 9 includes a cylinder body 14, a screw rod 15, a nut 16 and a pressing shaft rod 17. The cylinder body 14 is installed below the top plate 4. The screw rod 15 is limitedly set on the cylinder body 14 and can be connected through a bearing, suitable for rotation. The nut 16 is coaxially installed on the screw rod 15 to form a screw rod structure. The pressing shaft rod 17 is fixedly installed on the nut 16. When the screw rod 15 rotates, the nut 16 moves up and down, thereby driving the pressing shaft rod 17 to drive the pressing plate 5 below up and down. The screw rod structure enhances the accuracy of the clamp and the compact structure saves equipment space. The main body of the displacement sensor 11 is installed on the cylinder body 14, and the output end is installed on the pressing plate 5. When the output control assembly adjusts the position of the pressing plate 5, the specific position of the pressing plate 5 can be monitored according to the displacement sensor 11. At the same time, after completing the clamping of the battery cell to be tested, the displacement data of the expansion is monitored in real time during the process of the battery cell expanding and pushing the pressing plate 5 to move.

[0026] Among them, preferably, the transmission assembly 10 is installed above the top plate 4, and the transmission assembly 10 includes a driving wheel 18, a driven wheel 19 and a connecting belt 20. The output shaft of the driving assembly 8 passes through the top plate 4 and is connected to the driving wheel 18. The driven wheel 19 is connected to the upper end of the screw 15 passing through the top plate 4. The driving wheel 18 then drives the driven wheel 19 to rotate through the connecting belt 20, thereby driving the screw 15 to rotate and press the shaft 17 in the vertical direction to control the output.

[0027] Furthermore, the transmission assembly 10 also includes a tensioning mechanism 21, which is arranged on one side of the connecting belt 20. The tensioning mechanism 21 can be used to adjust the tightness of the connecting belt 20 to prevent the connecting belt 20 from slipping, thereby ensuring the accuracy of transmission.

[0028] Preferably, it also includes a connecting plate 22, which is installed below the pressing shaft 17 to increase the area of ​​the end of the pressing shaft 17, and a plurality of connecting screws 23 are arranged on the connecting plate 22 to fix the connecting plate 5. It can be known that in order to ensure the accuracy of measuring the battery cell, the pressure collector 7 is arranged in the middle of the pressing plate 5, and the pressing plate 5 is connected to the connecting plate 22 through the connecting screws 23, so that there is space between the pressure collector and the pressing shaft 17, and the projection area in the vertical direction does not overlap, thereby avoiding the force generated when the pressing shaft 17 is output to affect the sensing of the pressure collector, and better ensuring the accuracy.

[0029] The present application makes full use of the horizontal space by arranging the positions of the drive assembly 8 and the control output assembly 9 in the horizontal area of ​​the test platform 1, and uses the transmission assembly 10 with a smaller vertical space for transmission, avoiding the use of too much vertical space, and uses a screw structure in conjunction with a displacement sensor 11 to accurately move the pressure plate 5, so that the required test data can be accurately collected. The present application has a compact structure between the components, has a very high space utilization rate, can accurately collect and detect the required data, has a simple structure, and is low in cost, meeting the needs of most scenarios, especially multi-channel parallel testing scenarios.

[0030] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A simple self-controlled expansion fixture, comprising a test bench for placing a cell to be tested and a pressure plate arranged above the test bench for clamping the cell to be tested, wherein a pressure collector is arranged on the pressure plate, characterized in that: It also includes a driving component and a control output component installed on the bottom side of the top plate of the test bench, wherein a transmission component is connected between the output end of the driving component and the input end of the control output component; the output end of the control output component is vertically downward and fixedly connected to the pressing plate to drive the pressing plate to approach or move away from the battery cell; the control output component is also provided with a displacement sensor for detecting the displacement of the pressing plate; The transmission assembly is installed above the top plate, and the transmission assembly includes a driving wheel, a driven wheel and a connecting belt. The driving wheel is connected to the output end of the driving assembly, the driven wheel is connected to the input end of the control output assembly, and the connecting belt is connected between the driving wheel and the driven wheel.

2. A simple self-controlled expansion clamp according to claim 1, characterized in that The detection platform includes a bottom plate, a top plate and a plurality of guide pillars connected between the bottom plate and the top plate.

3. A simple self-controlled expansion clamp according to claim 2, characterized in that A plurality of sliding sleeves are installed on the pressure plate, and the pressure plate is slidably connected to the guide column through the sliding sleeves.

4. A simple self-controlled expansion clamp according to claim 1, characterized in that The transmission assembly also includes a tensioning mechanism, which is arranged on one side of the connecting belt.

5. A simple self-controlled expansion clamp according to claim 1, characterized in that The control output assembly includes a cylinder body, a screw rod, a nut and a pressing shaft rod. The cylinder body is installed under the top plate, the screw rod is rotatably set on the cylinder body, the nut is rotatably connected to the screw rod, and the pressing shaft rod is fixedly installed on the nut.

6. A simple self-controlled expansion clamp according to claim 5, characterized in that , also includes a connecting plate, which is installed under the pressing shaft rod, and a plurality of connecting screws are arranged on the connecting plate to fix the pressing plate.

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