Roll core tightness testing device

Abstract

The utility model provides a roll core tightness testing device, which comprises a base, a force measuring assembly, a shell and a testing assembly, the top surface of the base is used for placing a roll core, the force measuring assembly is arranged in the base and used for measuring the thrust applied to the roll core, the shell is arranged on the base, and the testing assembly is arranged on the shell. The shell is provided with a hole structure extending in the height direction of the base, the testing assembly comprises a power piece and a testing rod, the power piece is arranged on the shell, the testing rod is arranged outside the shell, the power piece is connected with the testing rod through the hole structure, and the power piece drives the testing rod to move towards or away from the roll core in the height direction of the base. According to the roll core tightness test device, the test rod of the test assembly moves towards the roll core by the preset distance to measure the thrust value, the tightness of the roll core is tested, the structure is simple, operation is convenient, the test efficiency is improved, and the test cost is reduced. Therefore, the problems of inconvenience in use and poor test efficiency of a roll core tightness test device in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of battery-related technology, and more specifically, to a device for testing the tightness of a battery core. Background Technology

[0002] The tightness of lithium-ion battery cores refers to the degree of tightness after the lithium-ion battery cores are wound. Core winding is an important process, and the tightness of the cores not only affects the appearance flatness of the finished cell, electrolyte absorption, battery thickness consistency, and yield, but also directly affects the performance of the cores. The tightness of the cores affects electrolyte wetting, battery cycle performance, and battery internal resistance. Therefore, quantitatively evaluating the tightness of the cores is of great significance in the research and development and production of batteries.

[0003] In existing technologies, the tightness of the battery core is generally determined by employees manually pulling it and then directly observing it with their eyes and making an experiential judgment. This is highly subjective and cannot form a certain quantitative standard, making it difficult to judge the quality of the battery cell and thus impossible to quantitatively control the battery. Currently, some testing equipment has appeared on the market that uses machines for testing. However, the current testing equipment has a complex structure, high procurement cost, and poor testing accuracy, resulting in poor testing efficiency.

[0004] As can be seen from the above, the current core tension testing device is inconvenient to use and has poor testing efficiency. Utility Model Content

[0005] The main purpose of this utility model is to provide a core tension testing device to solve the problems of inconvenience and poor testing efficiency of existing core tension testing devices.

[0006] To achieve the above objectives, according to one aspect of the present invention, a core tension testing device is provided. The core tension testing device includes a base, a force measuring component, a housing, and a testing component. The top surface of the base is used to place the core. The force measuring component is disposed inside the base and is used to measure the thrust force on the core. The housing is disposed on the base and has a hole structure extending along the height direction of the base. The testing component includes a power component and a testing rod. The power component is disposed on the housing, and the testing rod is disposed outside the housing. The power component is connected to the testing rod through the hole structure. The power component drives the testing rod to move toward or away from the core along the height direction of the base.

[0007] Furthermore, the test rod is coaxial with the core.

[0008] Furthermore, the distance between the hole structure and the top surface of the base is not less than the height of the core.

[0009] Furthermore, the power component is located inside the housing, and the test assembly also includes a support component and a moving block. One end of the support component is fixedly connected to the power component, and the other end of the support component is connected to the moving block through a through-hole structure. The test rod is located at the bottom of the moving block.

[0010] Furthermore, the end of the test rod away from the moving block has a conical structure, the conical head of which is used to abut against the core.

[0011] Furthermore, the core tension testing device also includes a limiting rod and a connecting rod. The limiting rod is set on the base and / or housing and extends along the height direction of the base. One end of the connecting rod is connected to the moving block, and the other end of the connecting rod is sleeved on the limiting rod.

[0012] Furthermore, the side of the housing has a positioning protrusion, one end of the limiting rod is fixed to the base, and the other end of the limiting rod passes through the positioning protrusion and is fixedly connected to the positioning protrusion.

[0013] Furthermore, the housing also has scale lines set on one side of the hole structure.

[0014] Furthermore, the top surface of the base has a limiting part, which is a boss structure with a positioning groove, and one axial end of the core is accommodated inside the positioning groove; or the limiting part is formed as a limiting groove, and one axial end of the core is accommodated inside the limiting groove.

[0015] Furthermore, the force measuring component includes a sensor, a display, a knob, and a controller. The sensor is located inside the base and is used to obtain the thrust force on the winding core. The display is located on the surface of the base. The knob is rotated on the base. The controller is located inside the base and is electrically connected to the sensor, display, knob, and power component.

[0016] By applying the technical solution of this utility model, the core tightness testing device of this application uses a base to support and place the core, realizing the positioning operation of the core. The test rod of the test component moves towards the core, and the corresponding force measuring component records the thrust value when the test rod moves a preset distance, so as to complete the core tightness test. The overall structure of this application is simple and easy to operate, which is conducive to improving the testing efficiency. Moreover, this application only relies on the movement of the push rod to complete the core tightness test, which is conducive to reducing the test deviation and thus improving the test accuracy.

[0017] This application places the force measuring component inside the base, thereby protecting the force measuring component from environmental factors that could affect its testing accuracy and extend its service life. The application also uses a housing to protect the power component, preventing accidental injury or damage to the power component from contact with the user, thus ensuring stable operation of the device. Furthermore, the housing and base design improves the overall aesthetics of the core tension testing device. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 The front view of the core tension testing device of this utility model is shown;

[0020] Figure 2 A three-dimensional structural schematic diagram of the core tightness testing device of this utility model is shown;

[0021] Figure 3 A side view of the core tension testing device of this utility model is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Base; 110. Boss structure; 20. Housing; 210. Hole structure; 220. Positioning protrusion; 230. Scale line; 30. Power component; 40. Support component; 50. Moving block; 60. Test rod; 610. Conical head structure; 611. Conical head; 70. Limiting rod; 80. Connecting rod; 90. Display component; 100. Knob. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] To address the problems of inconvenience and poor testing efficiency in existing core tightness testing devices, this application provides a core tightness testing device. This device is used to test the tightness of cylindrical cores to ensure that the cores meet quantitative standards and avoid problems such as affecting electrolyte wetting, battery cycle performance, and battery internal resistance.

[0028] The core tension testing device of this application is applicable to cores of different sizes.

[0029] like Figures 1 to 3 As shown, the core tension testing device includes a base 10, a force measuring component, a housing 20, and a testing component. The top surface of the base 10 is used to place the core. The force measuring component is located inside the base 10 and is used to measure the thrust force on the core. The housing 20 is located on the base 10 and has a hole structure 210 extending along the height direction of the base 10. The testing component includes a power component 30 and a testing rod 60. The power component 30 is located on the housing 20, and the testing rod 60 is located outside the housing 20. The power component 30 is connected to the testing rod 60 through the hole structure 210. The power component 30 drives the testing rod 60 to move toward or away from the core along the height direction of the base 10.

[0030] Specifically, the core tension testing device of this application uses a base 10 to support and place the core, thereby realizing the positioning operation of the core. The test rod 60 of the test component moves towards the core, and the thrust value measured by the corresponding force measuring component is recorded when the test rod 60 moves to a preset height, so as to complete the test of the core tension. The overall structure of this application is simple and easy to operate, which is conducive to improving the testing efficiency.

[0031] When the cores are wound together, friction exists between them, reflecting their tightness. Higher friction indicates tighter winding, while lower friction indicates looser winding. Therefore, after the test rod 60 moves a preset distance and pushes against the core, the force measuring component accurately measures the force acting on the core. This force corresponds to the friction between the cores. As shown above, the friction reflects the tightness of the cores; thus, this force allows for a quantitative evaluation of the core's tightness, enabling the consistent adjustment of tightness across similar cores. This device is simple in structure and easy to operate.

[0032] Specifically, the test rod 60 is set to abut against the positive end of the core, and the negative end of the core is set on the top surface of the base 10.

[0033] In this embodiment, the tightness test of the core is completed solely by the movement of the push rod, meaning that both the force measuring component and the core are fixed. The structural design of the core tightness test device in this application helps to reduce test deviation and thus improve test accuracy.

[0034] Furthermore, the test rod 60 of this application can move toward and away from the core under the drive of the power component 30, so as to facilitate its application to cores of different sizes and improve the applicability of the core tension testing device.

[0035] In this embodiment, both the housing 20 and the base 10 have accommodating cavities to provide for installation and placement. The arrangement of the housing 20 and the base 10 in this application also helps to improve the overall aesthetics of the core tension testing device.

[0036] Specifically, this application places the force measuring component inside the base 10, thereby enabling the base 10 to protect the force measuring component, preventing the force measuring component from being affected by environmental factors in terms of testing accuracy, and also helping to improve the service life of the force measuring component.

[0037] In this embodiment, the power component 30 is disposed inside the housing 20. The housing 20 is used to protect the power component 30. The housing 20 also prevents the user from accidentally injuring or damaging the power component 30 by contact, thus ensuring the stable operation of the device.

[0038] Among them, the power component 30 can be a structural component such as a telescopic motor or a telescopic cylinder.

[0039] like Figures 1 to 3As shown, the top surface of the base 10 is a platform surface for placing the core. In this embodiment, the housing 20 is disposed on the top surface of the base 10, and the housing 20 and the accommodating cavity of the base 10 are connected to facilitate the connection between the power component 30 and the force measuring component via a line. The line connection is disposed inside the accommodating cavity.

[0040] Specifically, the specific structures of the base 10 and the shell 20 can be adapted as needed, for example, the base 10 can be a cubic structure or a trapezoidal structure, and the shell 20 can be a cubic structure.

[0041] In this embodiment, the test rod 60 is coaxial with the core to ensure that the test rod 60 and the core are in center contact, thereby improving the accuracy of the test.

[0042] It is understandable that the height direction of the base 10 is in the same direction as the axis of the core.

[0043] In this embodiment, the distance between the hole structure 210 and the top surface of the base 10 is not less than the height of the core. By limiting the length of the hole structure 210 extending along the height direction of the base 10, the strength of the housing 20 is ensured, thereby improving the overall stability of the core tightness testing device.

[0044] like Figures 1 to 3 As shown, the test assembly also includes a support member 40 and a moving block 50. One end of the support member 40 is fixedly connected to the power member 30, and the other end of the support member 40 is connected to the moving block 50 through the hole structure 210. The test rod 60 is set at the bottom of the moving block 50.

[0045] Among them, the support member 40 can be either a support rod or a support plate.

[0046] Specifically, the power component 30 is connected to the moving block 50 through the support component 40. The power component 30 controls the movement of the support component 40 to drive the moving block 50 to move, and the moving block 50 drives the test rod 60 to move.

[0047] In this embodiment, the movable block 50 provides an installation position for the test rod 60. By setting the movable block 50, the stability of the movement of the test rod 60 can be improved, which facilitates the installation of the overall structure and ensures that the test rod 60 and the winding are set on the same axis.

[0048] like Figures 1 to 3 As shown, the end of the test rod 60 away from the moving block 50 has a cone head structure 610, and the cone head 611 of the cone head structure 610 is used to abut against the core.

[0049] The test rod 60 includes a rod body structure and a cone head structure 610. One end of the rod body structure is connected to the moving block 50, and the other end of the rod body structure is connected to the cone head structure 610. The cone head 611 of the cone head structure 610 is located on the side away from the rod body structure and is used to abut against the center of the core.

[0050] Specifically, the use of a conical head 611 for contact with the core facilitates the application to the center of cores of different sizes, and the setting of the conical head 611 helps to improve the stability of contact with the core.

[0051] In this embodiment, the core tension testing device also includes a limiting rod 70 and a connecting rod 80. The limiting rod 70 can be set on the base 10 or fixed on the housing 20. The limiting rod 70 extends along the height direction of the base 10. One end of the connecting rod 80 is connected to the moving block 50, and the other end of the connecting rod 80 is sleeved on the limiting rod 70.

[0052] In one specific embodiment of this example, the housing 20 has a positioning protrusion 220 on its side, one end of the limiting rod 70 is fixed to the base 10, and the other end of the limiting rod 70 passes through the positioning protrusion 220 and is fixedly connected to the positioning protrusion 220.

[0053] The limiting rod 70 is fixed to the base 10 and the object at both ends along the height direction of the base 10, which helps to improve the stability of the limiting rod 70. Specifically, the positioning protrusion 220 is used to fix the limiting rod 70, which helps to fix the limiting rod 70 axially and radially, further improving the stability of the installation of the limiting rod 70.

[0054] In this embodiment, by setting a cooperative structure of limiting rod 70, connecting rod 80 and moving block 50, limiting rod 70 has the function of limiting the movement of moving block 50, so as to keep moving block 50 moving along the height direction of base 10, avoiding the phenomenon of moving block 50 shaking or deviating, which is conducive to improving the stability and accuracy of tightness test.

[0055] In this embodiment, the connecting rod 80 can be inserted into the moving block 50, specifically, the connecting rod 80 is set perpendicular to the limiting rod 70 to further ensure the limiting effect of the limiting rod 70 on the moving block 50; or the connecting rod 80 can abut against the bottom of the support member 40, and the support member 40 drives the connecting rod 80 to move.

[0056] like Figures 1 to 3 As shown, the housing 20 also has a scale line 230 provided on one side of the hole structure 210.

[0057] Specifically, by setting scale lines 230 on the housing 20, it is convenient to observe the moving distance of the test rod 60, and to conveniently set the test rod 60 at a preset height, that is, to set a preset height between the conical head 611 of the test rod 60 and the core. The connecting rod 80 in this application has the effect of assisting in observing the scale.

[0058] In this embodiment, the top surface of the base 10 has a limiting portion, which is used to fix the winding core so that the winding core is stably placed on the base 10, facilitating the testing of the winding core's tightness. The following embodiments are provided depending on the structure of the limiting portion.

[0059] In one specific embodiment of this example, the limiting part is a boss structure 110, which has a positioning groove, and one axial end of the core is accommodated inside the positioning groove.

[0060] The boss structure 110 is provided with a positioning groove to facilitate the placement and fixing of the core inside the positioning groove. The side of the positioning groove is in contact with the outer circumference of the core, and the bottom of the groove is in contact with the bottom end of the core.

[0061] In another specific embodiment of this example, the limiting part is formed as a limiting groove, and one axial end of the winding core is accommodated inside the limiting groove.

[0062] The base 10 has a limiting groove structure on its top surface for placing the core, which facilitates operation.

[0063] In this embodiment, the force measuring component includes a sensor, a display 90, a knob 100, and a controller. The sensor is disposed inside the base 10 and is used to obtain the thrust received by the winding core. The display 90 is disposed on the surface of the base 10. The knob 100 is rotatably disposed on the base 10. The controller is disposed inside the base 10 and is electrically connected to the sensor, the display 90, the knob 100, and the power component 30.

[0064] Specifically, the sensing element is a pressure sensor, and the display element 90 is a display screen that displays the thrust value for easy observation and recording.

[0065] In this embodiment, during the tightness test of the core, the core is first placed on the limiting part on the top surface of the base 10, with the positive end of the core facing upwards. Then, the test rod 60 is set at a preset height. The moving speed of the test rod 60 is controlled by the knob 100, and the test rod 60 moves towards the core at a constant speed. After the test rod 60 has moved, the thrust on the core is displayed on the display 90 to complete the test.

[0066] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0067] The core tightness testing device of this application uses a base 10 to support and place the core, realizing the positioning operation of the core. The test rod 60 of the test component moves towards the core, and the corresponding force measuring component records the thrust value when the test rod 60 moves a preset distance, so as to complete the core tightness test. The overall structure of this application is simple and easy to operate, which is conducive to improving the testing efficiency. Moreover, this application only relies on the movement of the push rod to complete the core tightness test, which is conducive to reducing the test deviation and thus improving the test accuracy.

[0068] This application places the force measuring component inside the base 10, thereby protecting the force measuring component from environmental factors that could affect its testing accuracy and extend its service life. The application also uses a housing 20 to protect the power component 30, preventing accidental injury or damage to the power component from contact, thus ensuring stable operation. Furthermore, the housing 20 and base 10 in this application enhance the overall aesthetics of the core tension testing device.

[0069] The test rod 60 of this application can move toward and away from the core under the drive of the power component 30, so as to facilitate its application to cores of different sizes and improve the applicability of the core tension testing device.

[0070] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for testing the tightness of a winding core, characterized in that, include: A base (10), the top surface of which is used to place the core; A force measuring component is disposed inside the base (10) for measuring the thrust force on the core; A housing (20) is disposed on the base (10), the housing (20) having a hole structure (210) extending along the height direction of the base (10); The test assembly includes a power component (30) and a test rod (60). The power component (30) is disposed on the housing (20), and the test rod (60) is disposed outside the housing (20). The power component (30) is connected to the test rod (60) through the hole structure (210). The power component (30) drives the test rod (60) to move toward or away from the core along the height direction of the base (10).

2. The core tension testing device according to claim 1, characterized in that, The test rod (60) is coaxial with the core.

3. The core tension testing device according to claim 1, characterized in that, The distance between the hole structure (210) and the top surface of the base (10) is not less than the height of the core.

4. The core tension testing device according to claim 1, characterized in that, The power component (30) is disposed inside the housing (20), and the test assembly further includes: A support member (40), one end of which is fixedly connected to the power member (30); The moving block (50) has the other end of the support member (40) passing through the hole structure (210) and connected to the moving block (50), and the test rod (60) is located at the bottom of the moving block (50).

5. The core tension testing device according to claim 4, characterized in that, The test rod (60) has a cone head structure (610) at one end away from the moving block (50), and the cone head (611) of the cone head structure (610) is used to abut against the core.

6. The core tension testing device according to claim 4, characterized in that, The core tightness testing device also includes: A limiting rod (70) is provided on the base (10) and / or the housing (20), and the limiting rod (70) extends along the height direction of the base (10); A connecting rod (80) is provided, one end of which is connected to the moving block (50), and the other end of which is sleeved on the limiting rod (70).

7. The core tension testing device according to claim 6, characterized in that, The housing (20) has a positioning protrusion (220) on its side. One end of the limiting rod (70) is fixed to the base (10), and the other end of the limiting rod (70) passes through the positioning protrusion (220) and is fixedly connected to the positioning protrusion (220).

8. The core tension testing device according to claim 1, characterized in that, The housing (20) also has a scale line (230) on one side of the hole structure (210).

9. The core tension testing device according to claim 1, characterized in that, The top surface of the base (10) has a limiting portion. The limiting part is a boss structure (110), the boss structure (110) has a positioning groove, and one axial end of the winding core is accommodated inside the positioning groove; or The limiting part is formed as a limiting groove, and one axial end of the winding core is accommodated inside the limiting groove.

10. The device for testing the tightness of a winding core according to any one of claims 1 to 9, characterized in that, The force measuring component includes: A sensor is disposed inside the base (10) for acquiring the thrust received by the core; A display element (90) is disposed on the surface of the base (10); A knob (100) is rotatably mounted on the base (10); The controller is located inside the base (10) and is electrically connected to the sensor, the display (90), the knob (100) and the power unit (30).

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