Pinhole detection jig

Abstract

The utility model relates to a pinhole detection jig which comprises the components of a base which is provided with a positioning plane which is used for fitting with a battery diaphragm; the needle is connected to the base in a sliding mode, the needle is arranged to be perpendicular to the positioning plane, and the moving direction of the needle is perpendicular to the base; the needle is provided with a needle head used for puncturing the battery diaphragm, the needle has a first position and a second position, and when the needle moves from the first position to the second position, the needle head moves from one side of the positioning plane to the other side of the positioning plane. When the needle moves between the first position and the second position, the needle head can vertically penetrate through the battery diaphragm to form a needle hole in the battery diaphragm, so that the hole with the known size is punched in the battery diaphragm, and then the size of the hole is detected by a detection instrument, so that whether the detection instrument has an error or not is judged; and quality defects and potential safety hazards of the battery are avoided.

Description

Technical Field

[0001] This application relates to the technical field of battery separator production, and particularly to a pinhole detection fixture. Background Art

[0002] After the production of the battery separator, there are some tiny holes on a part of the battery separator. These small holes are too small to be measured by the naked eye. When the diameter of these holes is greater than 0.1 mm, the battery separator will be punctured by the current during use. Therefore, a special detection instrument is needed to detect the size of the holes on the battery separator after production.

[0003] The detection instrument first detects the size of the holes, and then judges whether the size of the holes meets the requirements. If not, it will alarm. The detection instrument is relatively precise. After long-term use, the detection of the hole size inside the detection instrument will be inaccurate due to component wear or other reasons. However, since the naked eye cannot measure, if the detection instrument has an error, the staff does not know, resulting in unqualified battery separators being judged as qualified by the detection instrument, which poses a great potential safety hazard. Summary of the Invention

[0004] The embodiments of this application provide a pinhole detection fixture to solve the problem in the related art that it is impossible to know whether the detection instrument has an error.

[0005] In a first aspect, a pinhole detection fixture is provided, which includes:

[0006] A base, on which there is a positioning plane for fitting with the battery separator;

[0007] A needle, which is slidably connected to the base, is perpendicular to the positioning plane, and the moving direction of the needle is perpendicular to the base;

[0008] There is a needle tip on the needle for puncturing the battery separator. The needle has a first position and a second position. When the needle moves from the first position to the second position, the needle tip moves from one side of the positioning plane to the other side.

[0009] In some embodiments, it further includes a threaded pressing plate and a button;

[0010] The threaded pressing plate is in threaded cooperation with the base. The button is slidably connected to the threaded pressing plate, the button is connected to the needle, and the moving direction of the button is the same as the moving direction of the needle.

[0011] In some embodiments, a spring is provided between the button and the base.

[0012] In some embodiments, it further includes a handle;

[0013] The base has a cuboid structure, and the handle is connected to the base. The handle is connected to the surface of the base opposite to the positioning plane, and the axis of the handle and the center of gravity of the base are located in the same vertical plane.

[0014] In some embodiments, the handle is arranged along the diagonal of the handle connection surface.

[0015] In some embodiments, a center line is provided on the base, the center line passes through the center of gravity of the base, and the needle is arranged on the center line.

[0016] The embodiment of the present application provides a pinhole detection jig. Since the present application makes the positioning plane fit the battery diaphragm, when the needle moves between the first position and the second position, the needle tip can vertically penetrate the battery diaphragm to punch a pinhole in the battery diaphragm. Given the known thickness of the needle, by using a detection instrument to detect the size of the pinhole, a conclusion can be drawn as to whether there is an error in the detection instrument. Therefore, the present application punches a hole of a known size in the battery diaphragm and then allows the detection instrument to detect the size of the hole, thereby determining whether there is an error in the detection instrument and avoiding potential safety hazards. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram provided by the embodiment of the present application;

[0019] Figure 2 It is a schematic structural diagram of the handle provided by the embodiment of the present application;

[0020] In the figure: 1. Base; 2. Needle; 3. Button; 4. Spring; 5. Threaded pressing plate; 6. Handle. Detailed Embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0022] The embodiment of the present application provides a pinhole detection jig, which can solve the problem in the related art that it is impossible to know whether there is an error in the detection instrument.

[0023] Please refer to Figures 1 to 2 , a pinhole detection fixture, which includes:

[0024] A base 1, on which there is a positioning plane for fitting with the battery separator;

[0025] A needle 2, which is slidably connected to the base 1, the needle 2 is perpendicular to the positioning plane, and the moving direction of the needle 2 is perpendicular to the positioning plane;

[0026] There is a needle tip on the needle 2 for punching holes in the battery separator. The needle 2 has a first position and a second position. When the needle 2 moves from the first position to the second position, the needle tip moves from one side of the positioning plane to the other side;

[0027] The needle 2 can be designed inside the base 1 or suspended on the side of the base 1. Before installing the needle 2 on the base 1, the size of the needle 2 needs to be known, and the diameter of the needle 2 after removing the needle tip is fixed;

[0028] During specific operation, the operator needs to pick up the base 1 first and press the positioning plane tightly against the battery separator to facilitate placing the needle 2 vertically and perpendicular to the battery separator. The positioning plane serves the purpose of assisting in placing the needle 2 relative to the battery film. At this time, the position of the needle 2 needs to be moved to pierce the battery separator with the needle tip. After the needle tip completely passes through the battery separator, a pinhole will be left on the battery separator, and the size of this pinhole is the same as the diameter of the needle 2 after removing the needle tip. Given the size of the pinhole, place this pinhole in the detection instrument to detect the size of the pinhole, and by comparing the detected data of the pinhole with the actual data of the pinhole, it can be determined whether there is an error in the detection instrument.

[0029] It also includes a button 3;

[0030] The button 3 is connected to the needle 2, the button 3 is slidably connected to the base 1, and the moving direction of the button 3 is the same as the moving direction of the needle 2;

[0031] The button 3 is cylindrical. Since the diameter of the needle 2 is small and it is inconvenient for the operator to directly operate, the needle 2 is fixed on the button 3, and the operator controls the needle 2 to vertically punch holes and pull out the needle 2 from the hole by pressing the button 3.

[0032] A spring 4 is provided between the button 3 and the base 1;

[0033] Both ends of the spring 4 are respectively connected to the button 3 and the base 1. The spring 4 continuously provides an upward pushing force to the button 3, so that after the button 3 is pressed downward and the spring 4 is compressed, the spring 4 will push the button 3 upward;

[0034] In the present application, the needle 2 is preferably designed to be within the base 1, that is, the needle 2 can be fully retracted within the base 1. When in use, the needle tip extends for needle insertion 2, and when not in use, it protects the needle 2. In actual use, after the staff completes the hole punching through the button 3, the needle 2 needs to be retracted. After adding the spring 4, after the needle 2 finishes punching the hole, the spring 4 will push the needle 2 out of the hole, and the needle 2 automatically retracts into the base 1. The staff does not need to manually pull out the needle 2 from the hole after needle insertion 2, improving the efficiency of needle insertion 2.

[0035] A threaded pressure plate 5 is provided between the button 3 and the base 1. The threaded pressure plate 5 is in threaded fit with the base 1, and the button 3 is slidably connected to the threaded pressure plate 5;

[0036] A round hole is provided in the middle of the threaded pressure plate 5. The opening direction of the round hole is perpendicular to the positioning plane. The button 3 passes through the round hole and the button 3 moves in the opening direction of the round hole, restricting the moving direction of the button 3. A convex platform is provided on the side of the button 3, which can prevent the needle 2 from detaching from the bottom plate due to the elastic force of the spring 4, restricting the stroke of the button 3. The movement path of the needle 2 is fixed by one part, the threaded pressure plate 5, and the structure is simple, convenient for disassembly, installation and maintenance.

[0037] It further includes a handle 6;

[0038] The base 1 is of a cuboid structure. The handle 6 is connected to the base 1. The handle 6 is connected to the surface of the base 1 opposite to the positioning plane. The axis of the handle 6 and the center of gravity of the base 1 are located in the same vertical plane;

[0039] The handle 6 is of a cylindrical structure. Mounting brackets are connected to both ends of the handle 6. The mounting brackets are respectively connected to the handle 6 and the base 1. If the base 1 is directly placed on the battery separator, the battery separator will be squeezed and deformed due to the weight of the base 1, resulting in the needle 2 being unable to vertically punch the hole. Therefore, it is necessary for the staff to hold the handle 6, lift the bottom plate while the positioning plane is attached to the battery separator, and install the handle 6 on the surface opposite to the positioning plane. When the staff holds the handle 6, the positioning plane will naturally face the battery separator, facilitating the staff to operate the present application;

[0040] At the same time, the position of the handle 6 must meet the adjustment that the axis of the handle 6 and the center of gravity of the base 1 are located in the same vertical plane. In this way, when the staff holds the handle 6, the deflection of the base 1 caused by the center of gravity problem can be minimized as much as possible. When holding the handle 6, it is convenient to attach the positioning plane to the lithium battery separator and the needle 2 is perpendicular to the battery separator.

[0041] The handle 6 is arranged along the diagonal of the connection surface of the handle 6;

[0042] The base 1 of this application should be designed as small as possible, which has two purposes. First, since the area where personnel can move during on-site hole punching is small, only one hand can be used to operate the device. Therefore, this approach can control the weight of this application. Second, if the base 1 is too large during on-site hole punching, it is difficult to align the needle 2 with the area of the product to be detected. This approach can expand the positions where holes can be punched in this application;

[0043] After making the base 1 smaller, in order to ensure that this application can be held by one hand, the length of the handle 6 needs to be increased. The handle 6 is arranged along the diagonal of the connection surface of the handle 6, which is the scheme with the maximum length of the handle 6 under the condition that the axis of the handle 6 and the center of gravity of the base 1 are in the same vertical plane, enhancing the applicability of this application.

[0044] A center line is provided on the base 1, and the center line passes through the center of gravity of the base 1. The needle 2 is arranged on the center line;

[0045] The center line divides the base 1 into two equal halves as Figure 2 shown. When in use, the button 3 needs to be pressed. After the button 3 is pressed, the bottom plate will also be stressed. According to the above design, it is ensured that the bottom plate will not deflect after being stressed, thereby avoiding the situation where the needle 2 does not punch holes vertically after the button 3 is pressed.

[0046] The working principle of this application is as follows:

[0047] When in use, hold the handle 6 with one hand, lift this application and fit the positioning plane with the lithium battery separator, then press the button 3, and use the vertical movement of the needle 2 to punch holes. After punching the holes, the spring 4 applies an elastic force to the button 3, and the needle 2 retracts into the bottom plate to complete the hole punching. The size of the needle hole is detected by a detection instrument, and by comparing the detected data of the needle hole with the actual data of the needle hole, it is determined whether there is an error in the detection instrument, avoiding potential safety hazards.

[0048] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to this application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0050] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A pinhole detection fixture, characterized in that: include: A base (1), wherein the base (1) has a positioning plane for fitting with a battery separator; A needle (2), the needle (2) being slidably connected to the base (1), the needle (2) being arranged perpendicular to the positioning plane, and the moving direction of the needle (2) being perpendicular to the base (1); The needle (2) has a needle head for piercing a battery diaphragm. The needle (2) has a first position and a second position. When the needle (2) moves from the first position to the second position, the needle head moves from one side of the positioning plane to the other side.

2. The pinhole detection fixture according to claim 1, characterized in that: Also includes a button (3); The button (3) is connected to the needle (2), the button (3) is slidably connected to the base (1), and the moving direction of the button (3) is the same as the moving direction of the needle (2).

3. The pinhole detection jig according to claim 2, characterized in that: A spring (4) is provided between the button (3) and the base (1).

4. The pinhole detection jig according to claim 2, characterized in that: A threaded pressing plate (5) is provided between the button (3) and the base (1); the threaded pressing plate (5) and the base (1) are threadedly matched, and the button (3) and the threaded pressing plate (5) are slidably connected.

5. The pinhole detection jig according to claim 1, characterized in that: Also includes a handle (6); The base (1) is a rectangular parallelepiped structure, the handle (6) is connected to the base (1), the handle (6) is connected to a surface of the base (1) relative to a positioning plane, and the axis of the handle (6) and the center of gravity of the base (1) are located on the same vertical plane.

6. The pinhole detection jig according to claim 5, characterized in that: The base (1) is provided with a center line, the center line passes through the center of gravity of the base (1), and the needle (2) is arranged on the center line.

Images