Sealing element pushing and pressing structure and liquid injection hole sealing equipment

Abstract

The utility model relates to a sealing element pushing and pressing structure which comprises a body and a pressing block, and a depth limiting face is arranged at one end of the body; the pressing block is fixedly arranged on the body, and the pressing block and the depth limiting face are located at the same end of the body. The depth limiting surface and the pressing block are arranged at one end of the body, the depth limiting surface is used for abutting against and limiting the surface, provided with a liquid injection hole, of a battery shell, and the pressing block is used for pressing the sealing piece into the liquid injection hole of the battery, so that the body is limited to the outer side of the battery through the depth limiting surface; meanwhile, the deepest stroke of the pressing block in the sealing piece pressing process is limited, it is guaranteed that the pressing-in depth of the sealing piece is stable, and the technical problem that in the prior art, due to the fact that an existing sealing piece pushing and pressing structure cannot guarantee the pressing-in depth of the sealing piece is stable, frequent shutdown debugging is needed, and the productivity is insufficient is solved.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a sealing member pushing structure and a liquid injection hole sealing device. Background Art

[0002] With the rapid development of batteries, the requirements for battery safety testing are becoming increasingly higher. During the battery processing process, the battery needs to seal the injection hole after the injection is completed. The current sealing method is mainly to press a sealant (such as a steel ball) into the injection hole to seal it.

[0003] In the prior art, the seal push mechanism cannot ensure a stable seal insertion depth. Excessive insertion depth can render the battery scrapped, while insufficient insertion depth results in poor sealing, which in turn fails to meet product quality standards and requires production downtime for debugging, impacting production capacity. In other words, the prior art suffers from the problem of insufficient production capacity due to the unstable seal insertion depth, which requires frequent downtime for debugging.

[0004] Therefore, it is necessary to design a new seal pushing structure to overcome the above problems. Utility Model Content

[0005] The present application provides a sealing member pushing structure and a liquid injection hole sealing device, which can solve the technical problem in the related art that the sealing member pushing structure cannot ensure the stable pressing depth of the seal, resulting in frequent shutdown and debugging and insufficient production capacity.

[0006] In the first aspect, an embodiment of the present application provides a sealing member pushing structure, which includes: a body and a pressure block, wherein one end of the body is provided with a depth limiting surface, and the depth limiting surface is used to abut and limit the surface of the battery housing provided with an injection hole; the pressure block is fixed to the body, and the pressure block and the depth limiting surface are located at the same end of the body, and the pressure block is used to press the seal into the injection hole. It should be noted that the battery housing in the present application includes a shell and a cover plate, and the injection hole can be provided in the shell or in the cover plate.

[0007] Among them, a depth limiting surface is provided at one end of the body, and the depth limiting surface and the pressure block are located at the same end of the body. The depth limiting surface allows the body to be limited outside the battery, and at the same time limits the deepest stroke of the pressure block during the sealing process, so that the depth displacement fluctuation range of the pressure block is small, ensuring the stability of the sealing member's pressing depth and improving the stability of the sealing member's pressing depth.

[0008] In combination with the first aspect, in one embodiment, the pressing block has a sealing contact surface and a pressing block side surface, the sealing contact surface is connected to the bottom of the pressing block side surface, and no chamfer is set between the sealing contact surface and the pressing block side surface. Wherein, the sealing contact surface is located at one end of the pressing block, and when the seal is a spherical seal such as a steel ball, the sealing contact surface enables the pressing block to contact the highest point of the steel ball during the pressing process of the seal, and no chamfer is set between the sealing contact surface and the pressing block side surface, so that the area of ​​the sealing contact surface can be relatively large, thereby effectively preventing the pressing block from sliding during the pressing process of the spherical seal, ensuring that the sealing contact surface abuts the highest point of the seal when it is knocked down, so that the final depth of the seal of the pressing block is not affected when it is knocked down.

[0009] In conjunction with the first aspect, in one embodiment, the pressure block is connected to the depth limiting surface, and no chamfer is provided at the connection between the depth limiting surface and the pressure block. The absence of a chamfer at the connection between the depth limiting surface and the pressure block effectively prevents the pressure block from sliding increasingly farther into the injection hole during the sealing process, causing the chamfer to contact the wall of the injection hole and scratch the injection hole, thereby ensuring the stability of the seal pushing structure when striking the steel ball.

[0010] In combination with the first aspect, in one embodiment, the pressure block is located at the center of the depth limiting surface, and the outer diameter d1 of the depth limiting surface and the maximum diameter d2 of the injection hole satisfy: 1.45mm≤d1-d2≤1.55mm. Exemplarily, when the maximum diameter d2 of the injection hole is 3.5mm, the outer diameter d1 of the depth limiting surface can be set to 4.95~5.05mm. Preferably, the outer diameter d1 of the depth limiting surface is set to 5mm. By making the outer diameter of the depth limiting surface and the maximum diameter of the injection hole satisfy the above relationship, the limiting effect of the depth limiting surface can be ensured while reducing the contact area between the depth limiting surface and the battery casing, thereby reducing the impact marks on the battery top cover caused by the body when contacting the battery top cover.

[0011] In combination with the first aspect, in one embodiment, the outer diameter d4 of the pressing block and the minimum diameter d3 of the liquid injection hole satisfy the following relationship: 0.15mm≤d3-d4≤0.25mm. Exemplarily, when the minimum diameter d3 of the liquid injection hole is 2mm, the outer diameter d4 of the pressing block can be set to 1.75-1.85mm. Preferably, the outer diameter d4 of the pressing block is set to 1.8mm. By ensuring that the outer diameter of the pressing block and the minimum diameter of the liquid injection hole satisfy the above relationship, the pressing block can be prevented from scratching the battery liquid injection port. At the same time, the pressing block has a relatively large surface area that can contact the seal, thereby facilitating stable contact with the seal and ensuring the stability of the pressing block pressing the seal.

[0012] In combination with the first aspect, in one embodiment, the thickness of the pressing block along its axial direction has a value range of 0.53 to 0.57 mm. The value range of the thickness of the pressing block along its axial direction can be set to 0.53 to 0.57 mm. Preferably, the thickness of the pressing block along its axial direction is set to 0.55 mm. The thickness of the pressing block along its axial direction satisfies the above value range. By cooperating with the depth limit surface, the pressing depth of the seal is relatively moderate, which can prevent the seal from being pressed too deep, resulting in the battery being scrapped, and can also avoid insufficient pressing depth, resulting in poor sealing effect.

[0013] In conjunction with the first aspect, in one embodiment, the body includes a main portion and a transition portion, the transition portion being connected between the main portion and the pressure block, and the cross-sectional area of ​​the transition portion gradually decreases in a direction away from the main portion. The cross-sectional area of ​​the transition portion gradually decreases in a direction away from the main portion, so that the outer diameter of the body can gradually decrease along its axial direction at the transition portion to an outer diameter close to the depth limit surface, so that the force of the seal pushing structure pressing the seal is concentrated on the pressure block, thereby ensuring the efficiency of the seal pushing structure pressing the seal.

[0014] In conjunction with the first aspect, in one embodiment, the depth stop surface is located at an end of the transition portion away from the main body, and a chamfer is provided at the connection between the depth stop surface and the transition portion. The chamfer provided at the connection between the depth stop surface and the transition portion reduces the contact area between the depth stop surface and the battery casing, thereby reducing scratches caused by the impact of the main body on the battery top cover.

[0015] In combination with the first aspect, in one embodiment, a mounting groove is provided at one end of the body away from the pressing block, wherein the mounting groove is provided at the rear of the body so that the body can be mounted on other devices.

[0016] In a second aspect, an embodiment of the present application provides a liquid injection hole sealing device, which includes the above-mentioned sealing member pushing structure and a driving device, and the sealing member pushing structure is installed on the driving device.

[0017] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0018] By setting a depth limit surface at one end of the main body, the main body is limited to the outside of the battery by the depth limit surface, and at the same time, the deepest stroke of the pressing block in the process of pressing the seal is limited, thereby ensuring the stable pressing depth of the seal. This solves the technical problem in the related technology that the seal pushing structure cannot ensure the stable pressing depth of the seal, resulting in frequent shutdown and debugging and insufficient production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic structural diagram of a sealing member pushing structure provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of a partial structure of a compression block provided in an embodiment of the present application installed in a transition portion;

[0022] Figure 3 A schematic structural diagram of a seal pushing structure provided in an embodiment of the present application;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 A schematic structural diagram of an installation mechanism for assembling a seal pushing structure provided in an embodiment of the present application.

[0025] In the figure: 1. Main body; 11. Depth limit surface; 12. Chamfer; 13. Main body; 14. Transition part; 15. Mounting groove; 2. Pressure block; 21. Sealing contact surface; 3. Mounting mechanism; 31. Impact block; 32. Limit sleeve; 33. Guide sleeve; 34. Sealing pre-compression block. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The embodiments of the present application provide a sealing member pushing structure and a liquid injection hole sealing device, which can solve the technical problem that the sealing member pushing structure cannot ensure the stable pressing depth of the seal, resulting in frequent shutdown and debugging and insufficient production capacity.

[0028] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides a sealing member pushing structure, which includes: a main body 1 and a pressure block 2. One end of the main body 1 is provided with a depth limiting surface 11, and the depth limiting surface 11 is used to abut and limit the surface of the battery housing provided with an injection hole; the pressure block 2 is fixed to the main body 1, and the pressure block 2 and the depth limiting surface 11 are located at the same end of the main body 1, and the pressure block 2 is used to press the sealing member into the injection hole. It should be noted that the battery housing in this application includes a shell and a cover plate, and the injection hole can be provided in the shell or in the cover plate.

[0029] In this embodiment, the axis of the main body 1 is collinear with the axis of the pressing block 2, the extension direction of the depth limiting surface 11 is perpendicular to the axis of the pressing block 2, and a depth limiting surface 11 is provided at one end of the main body 1, so that the main body 1 can be limited to the outside of the battery by abutting against the battery shell, so that the depth displacement fluctuation range of the pressing block 2 is smaller, and the stability of the sealing pushing structure in pressing the seal is improved. The depth limiting surface 11 and the pressing block 2 are located at the same end of the main body 1, so that the deepest stroke of the pressing block 2 during the sealing process is limited.

[0030] This embodiment provides the depth limiting surface 11 at one end of the main body 1 so that the main body 1 is limited to the outside of the battery by the depth limiting surface 11, and at the same time limits the deepest stroke of the pressing block 2 during the sealing process, thereby ensuring the stable pressing depth of the seal. This solves the technical problem in the related art that the seal pushing structure cannot ensure the stable pressing depth of the seal, resulting in frequent shutdowns for debugging and insufficient production capacity.

[0031] Exemplarily, the sealing member pushing structure can be set as a steel needle, the sealing member can be set as a steel ball, the main body 1 and the pressing block 2 can both be made of steel, and by cooperating with the depth limiting surface 11 and the pressing block, the changeover time of the sealing member pressing process can be significantly reduced, and the equipment failure rate of other processes cooperating with the injection hole sealing process can also be reduced synchronously.

[0032] Further, see Figure 2 and Figure 4 As shown, in some embodiments, the pressing block 2 has a sealing contact surface 21 and a pressing block side surface, the sealing contact surface 21 is connected to the bottom of the pressing block side surface, and no chamfer is set between the sealing contact surface 21 and the pressing block side surface. In this embodiment, the sealing contact surface 21 is located at one end of the pressing block 2. When the seal is a spherical seal such as a steel ball, the sealing contact surface 21 enables the pressing block 2 to contact the highest point of the steel ball during the sealing process. The sealing contact surface 21 is not set between the side surface of the pressing block 2, which can make the area of ​​the sealing contact surface 21 relatively large, thereby effectively preventing the pressing block 2 from sliding during the pressing of the spherical seal, ensuring that the sealing contact surface 21 abuts the highest point of the seal when it is knocked down, so that the final depth of the seal of the pressing block 2 is not affected when it is knocked down.

[0033] Further, see Figure 2 and Figure 4 As shown, in some embodiments, the pressing block 2 is connected to the depth limiting surface 11, and no chamfer is provided at the connection between the depth limiting surface 11 and the pressing block 2. In this embodiment, no chamfer is provided at the connection between the depth limiting surface 11 and the pressing block 2, which can effectively prevent the pressing block 2 from sliding increasingly farther into the injection hole during the sealing process, causing the chamfer to contact the wall of the injection hole and scratch the injection hole.

[0034] Further, see Figure 2 and Figure 4 As shown, in some embodiments, the pressing block 2 is located at the center of the depth limiting surface 11, and the outer diameter d1 of the depth limiting surface 11 and the maximum diameter d2 of the injection hole satisfy: 1.45mm≤d1-d2≤1.55mm.

[0035] In this embodiment, when the maximum diameter d2 of the injection hole is 3.5 mm, the outer diameter d1 of the depth limit surface 11 can be set to 4.95-5.05 mm. Preferably, the outer diameter d1 of the depth limit surface 11 is set to 5 mm, which can limit the deepest stroke of the pressure block 2 during the sealing process. By making the outer diameter d1 of the depth limit surface 11 and the maximum diameter d2 of the injection hole satisfy the above relationship, the limiting effect of the depth limit surface 11 can be ensured while reducing the contact area between the depth limit surface 11 and the battery shell, thereby reducing the impact marks caused by the body 1 on the battery top cover when contacting the battery top cover. Among them, since the diameter of the injection hole may vary, the maximum diameter of the injection hole refers to the maximum value of the diameter corresponding to each point along the axis of the injection hole. Correspondingly, the minimum diameter of the injection hole refers to the minimum value of the diameter corresponding to each point along the axis of the injection hole.

[0036] Further, see Figure 2 and Figure 4 As shown, in some embodiments, the outer diameter d4 of the pressing block 2 and the minimum diameter d3 of the injection hole satisfy: 0.15 mm ≤ d3 - d4 ≤ 0.25 mm.

[0037] In this embodiment, when the minimum diameter d3 of the injection hole is 2 mm, the outer diameter d4 of the pressing block 2 can be set to 1.75-1.85 mm. Preferably, the outer diameter d4 of the pressing block 2 is set to 1.8 mm. By making the outer diameter d4 of the pressing block 2 and the minimum diameter d3 of the injection hole satisfy the above relationship, the pressing block 2 can be prevented from scratching the battery injection hole. At the same time, the pressing block 2 has a relatively large surface area that can contact the sealing member, so that it is easy to maintain stable contact with the sealing member, thereby ensuring the stability of the pressing block 2 pressing the sealing member.

[0038] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the thickness of the pressing block 2 along its axial direction ranges from 0.53 to 0.57 mm. In this embodiment, the thickness of the pressing block 2 along its axial direction can range from 0.53 to 0.57 mm. Preferably, the thickness of the pressing block 2 along its axial direction is set to 0.55 mm. The thickness of the pressing block 2 along its axial direction meets the above value range. By cooperating with the depth limiting surface 11, the pressing depth of the sealing member is relatively moderate, which can prevent the sealing member from being pressed too deeply, resulting in the battery being scrapped, and can also avoid the sealing effect being poor due to insufficient pressing depth.

[0039] Further, see Figure 1As shown, in some embodiments, the body 1 includes a main body 13 and a transition portion 14, the transition portion 14 is connected between the main body 13 and the pressure block 2, and the cross-sectional area of ​​the transition portion 14 gradually decreases in the direction away from the main body 13. In this embodiment, the length of the main body 13 can be set to 90-92 mm, the length of the transition portion 14 can be set to 28-30 mm, the main body 13 is set to a cylinder, the outer diameter of the body 1 can be set to 9.95-10.05 mm, preferably, the outer diameter of the body 1 is set to 10 mm, which is convenient for clamping by other devices. The cross-sectional area of ​​the transition portion 14 gradually decreases in the direction away from the main body 13, so that the outer diameter of the body 1 can be gradually reduced along its axial direction at the transition portion 14 to an outer diameter close to the depth limit surface 11, so that the force of the seal pushing structure pressing the seal is concentrated on the pressure block 2, thereby ensuring the efficiency of the seal pushing structure pressing the seal.

[0040] Further, see Figure 1 and Figure 4 As shown, in some embodiments, the depth limiting surface 11 is located at an end of the transition portion 14 away from the main body 13, and a chamfer 12 is provided at the connection between the depth limiting surface 11 and the transition portion 14. In this embodiment, the chamfer 12 is provided at the connection between the depth limiting surface 11 and the transition portion 14 to reduce the contact area between the depth limiting surface 11 and the battery casing, thereby reducing scratches caused by the impact of the body 1 on the battery top cover. The inclination angle of the chamfer 12 can be set to 44.5 to 45.5 degrees, and preferably, the inclination angle of the chamfer 12 is set to 45 degrees.

[0041] Further, see Figure 1 As shown, in some embodiments, a mounting groove 15 is provided at one end of the body 1 away from the pressing block 2. In this embodiment, the mounting groove 15 is provided at the rear end of the body 1 so that the body 1 can be mounted on other devices. The inner diameter of the mounting groove 15 can be set to 8.5 to 9.5 mm, preferably, the inner diameter of the mounting groove 15 is set to 9 mm.

[0042] See also Figure 3-5 As shown, an embodiment of the present application provides a liquid injection hole sealing device, which includes the above-mentioned sealing member pushing structure and a driving device, and the sealing member pushing structure is installed on the driving device.

[0043] In this embodiment, the seal pushing structure can be set as a steel needle, and the seal can be set as a steel ball. The driving device includes a motor, a cylinder and a mounting mechanism 3. The mounting mechanism 3 is sleeved on the seal pushing structure. The motor and the cylinder cooperate to drive the mounting mechanism 3 so that the seal pushing structure presses the seal. The mounting mechanism 3 can position the seal pushing structure on the outside of the battery during the sealing process. The mounting mechanism 3 includes a collision block 31. A limiting sleeve 32 is installed at the bottom of the collision block 31. The limiting sleeve 32 is sleeved on the tail of the body 1, and the head of the body 1 is plugged with a guide sleeve 33. The outer side of the guide sleeve 33 is sleeved with a sealing pre-pressing block 34. Before strong knocking, the sealing pre-pressing block 34 pre-presses the battery shell, so that the battery shell is stressed and deformed before knocking, causing the battery shell to sink in advance, thereby increasing the supporting force of the battery top cover located around the injection hole, thereby forming a reverse supporting force to support the sealing pushing structure during knocking, ensuring the stability of the sealing depth during the downward pressing process of the sealing pushing structure, and ensuring that the seal can be knocked smoothly to the battery injection hole. The limiting sleeve 32 and the sealing pre-pressing block 34 cooperate with the depth limiting surface 11 to avoid the generation of indentations while controlling the depth displacement fluctuation of the pressing block 2.

[0044] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, 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 a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] It should be noted that, in this application, relational terms such as "first" and "second" are used only 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 terms "include", "comprise" or any other variants thereof are 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 explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0046] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A sealing member pushing structure for sealing a battery liquid injection hole, characterized in that: It includes: A body (1), one end of the body (1) is provided with a depth limiting surface (11), the depth limiting surface (11) being used for abutting and limiting against a surface of a battery shell provided with a liquid injection hole; A pressing block (2), the pressing block (2) is fixed to the body (1), and the pressing block (2) and the depth limiting surface (11) are located at the same end of the body (1), and the pressing block (2) is used to press the sealing member into the injection hole.

2. The seal pushing structure according to claim 1, wherein: The pressing block (2) has a sealing contact surface (21) and a pressing block side surface, the sealing contact surface (21) is connected below the pressing block side surface, and no chamfer is provided between the sealing contact surface (21) and the pressing block side surface.

3. The seal pushing structure according to claim 1 or 2, characterized in that: The pressing block (2) is connected to the depth limiting surface (11), and no chamfer is provided at the connection between the depth limiting surface (11) and the pressing block (2).

4. The seal pushing structure according to claim 1, wherein: The pressing block (2) is located at the center of the depth limiting surface (11), and the outer diameter d1 of the depth limiting surface (11) and the maximum diameter d2 of the injection hole satisfy the following relationship: 1.45 mm ≤ d1 - d2 ≤ 1.55 mm.

5. The seal pushing structure according to claim 1, wherein: The outer diameter d4 of the pressing block (2) and the minimum diameter d3 of the injection hole satisfy the following relationship: 0.15 mm ≤ d3 - d4 ≤ 0.25 mm.

6. The seal pushing structure according to claim 1, wherein: The thickness of the pressing block (2) along its axial direction ranges from 0.53 to 0.57 mm.

7. The seal pushing structure according to claim 1, wherein: The body (1) comprises a main body portion (13) and a transition portion (14), wherein the transition portion (14) is connected between the main body portion (13) and the pressing block (2), and the cross-sectional area of ​​the transition portion (14) gradually decreases in a direction away from the main body portion (13).

8. The seal pushing structure according to claim 7, wherein: The depth limiting surface (11) is located at an end of the transition portion (14) away from the main body portion (13), and a chamfer (12) is provided at the connection between the depth limiting surface (11) and the transition portion (14).

9. The seal pushing structure according to claim 1, wherein: An installation groove (15) is provided at one end of the body (1) away from the pressing block (2).

10. A liquid injection hole sealing device, characterized in that: The liquid injection hole sealing device includes a sealing member pushing structure and a driving device as described in any one of claims 1 to 9, and the sealing member pushing structure is installed on the driving device.

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