Nail pressing structure and nail pressing device

Abstract

The utility model belongs to the technical field of battery processing, and discloses a nail pressing structure and a nail pressing device. The nail pressing structure comprises a connecting piece and a pressing assembly which are connected, the pressing assembly comprises a first pressing part, and the first pressing part is used for abutting against the sealing nail and can divide the edge of the sealing nail into a plurality of spaced welding sections. According to the nail pressing structure and the nail pressing device, the pressing assembly is arranged, the two ends of the welding section are pressed by the two ends of the pressing strip, the inner side of the welding section is pressed by the pressing strip, when the sealing nail is welded, the welding section can be welded firstly, under the pressing force effect of the pressing strip, the tilting trend of the welding section is limited, the flatness of the welding position is better, and the welding efficiency is improved. And compared with pre-welding of spot welding in the prior art, the welding area is larger, the sealing nail is prevented from deviating in the full welding process after the nail pressing structure is taken away, and then the sealing performance of welding of the whole sealing nail is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a pressing nail structure and a pressing nail device. Background Art

[0002] During battery production, the battery cell is first placed in the shell, then the top cover is welded to the shell to seal the open end of the shell, and then the electrolyte is injected into the shell through the injection hole on the top cover. After the battery completes the formation process, the sealing nail is used to seal the injection hole.

[0003] The injection hole is a countersunk hole. When sealing the injection hole, a sealing pin is placed into the injection hole. The sealing pin is then pressed and spot welded using a welding pressure pin device to pre-connect the sealing pin with the edge of the countersunk hole. The entire seal is then welded. However, most commonly used lithium-ion battery sealing pin welding pressure pin devices use a single-point pressure pinning method using the rod head. This pressure pinning method only presses a portion of the sealing pin surface, failing to achieve a good fixing effect. This can cause the aluminum pin to deviate and warp, resulting in poor battery seal welding.

[0004] Therefore, there is an urgent need to design a nail pressing structure and a nail pressing device to solve the above problems. Utility Model Content

[0005] One purpose of the present utility model is to provide a pressing nail structure, which divides the edge of the sealing nail into several welding sections when pressing the sealing nail. The two ends and the inner side of the welding section are pressed by the pressing assembly, so that the sealing nail is not prone to warping during welding.

[0006] Another object of the present invention is to provide a nail pressing device, by using the nail pressing device in conjunction with welding, the sealing nail is not prone to warping.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] The pressing nail structure includes a connected connecting piece and a pressing assembly, wherein the pressing assembly includes a first pressing portion, which is used to press the sealing nail and divide the edge of the sealing nail into a plurality of spaced welding sections.

[0009] As an optional solution, the above-mentioned first pressing part includes at least two pressing strips, each of which can be pressed on the above-mentioned sealing pin, and each of the above-mentioned pressing strips intersects with the edge of the above-mentioned sealing pin to form two pressure points, and the line connecting the two pressure points is located inside the edge of the above-mentioned sealing pin.

[0010] As an optional solution, both ends of at least one of the above-mentioned pressure strips extend outward to form a second pressing portion, and the above-mentioned second pressing portion is used to press the surface of the top cover.

[0011] As an optional solution, at least three of the above-mentioned pressure strips are provided, and the at least three above-mentioned pressure strips are connected end to end.

[0012] As an optional solution, a connecting rod is connected between each of the above-mentioned pressure strips and the above-mentioned connecting member.

[0013] As an optional solution, the first pressing portion is constructed as a plate.

[0014] As an optional solution, the above-mentioned pressing assembly also includes a third pressing part, which is connected to the above-mentioned first pressing part and is a plate manufactured integrally with the above-mentioned first pressing part. The above-mentioned third pressing part is used to press the surface of the top cover.

[0015] As an optional solution, the first pressing portion includes:

[0016] a first pressing member connected to the connecting member, the first pressing member being used to press the inside of the sealing nail;

[0017] At least two second pressing members are connected to the first pressing member and are spaced apart along the circumference of the first pressing member. The second pressing members can press the sealing pin and separate the edge of the sealing pin into a plurality of welding sections.

[0018] As an optional solution, the pressing assembly further includes a fourth pressing portion, which is formed by extending from the second pressing member in a direction away from the first pressing member, and is used to press the surface of the top cover.

[0019] The pressing nail device includes a driving mechanism and the above-mentioned pressing nail structure. The above-mentioned connecting piece is detachably connected to the output end of the above-mentioned driving mechanism. The above-mentioned driving mechanism can drive the above-mentioned pressing assembly to approach or move away from the above-mentioned sealing nail.

[0020] The beneficial effects of the present invention are:

[0021] The utility model provides a pressure nail structure, which is provided with a first pressing part. After the first pressing part is pressed onto the sealing nail, the edge of the sealing nail is divided into several welding sections. The two ends of the welding section are pressed by the two ends of the pressure strip, and the inside of the welding section (the part of the welding section facing the center of the sealing nail) is pressed by the pressure strip. When welding the sealing nail, the welding section can be welded first. Under the pressing force of the pressure strip, the tendency of the welding section to tilt is restricted, the flatness of the welding position is better, and compared with the spot welding pre-welding in the prior art, the welding area is larger, which prevents the sealing nail from shifting during the full welding process after the pressure nail structure is removed, thereby improving the sealing of the entire sealing nail welding.

[0022] This embodiment also provides a pressure nail device, comprising the aforementioned pressure nail structure and a drive mechanism. A connector is connected to the output end of the drive mechanism, and the drive mechanism is capable of driving the pressure assembly toward or away from the sealing nail. The drive mechanism provides driving force to the pressure assembly, pressing it against the sealing nail to achieve a pressing effect. By utilizing the aforementioned pressure nail structure and using a welding gun for welding, the pressure nail device is less likely to warp the sealing nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly and easily, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the pressure nail structure provided in the first embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the pressure nail structure provided in Example 1. Figure 2 ;

[0026] Figure 3 This is a structural diagram of a press-nail structure provided by an optional embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the pressure nail structure provided in the second embodiment of the present invention. Figure 1 ;

[0028] Figure 5 This is a schematic diagram of the structure of the pressure nail structure provided in the second embodiment of the present invention. Figure 2 ;

[0029] Figure 6 This is a schematic diagram of the structure of the pressure nail structure provided by the third embodiment of the present invention. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the structure of the pressure nail structure provided by the third embodiment of the present invention. Figure 2 .

[0031] In the picture:

[0032] 10. Connectors;

[0033] 20. Pressing assembly; 21. First pressing portion; 211. Pressing strip;

[0034] 212, first pressing member; 213, second pressing member; 22, second pressing portion; 23, third pressing portion; 24, fourth pressing portion; 25, reinforcement member;

[0035] 30. Connecting rod;

[0036] 400, sealing nail; 410, welding section; 420, pressure point; 430, non-first welding section;

[0037] 500. Top cover. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] Example 1

[0043] This embodiment provides a pressure nail structure, which divides the edge of the sealing nail 400 into several welding sections 410 when pressing the sealing nail 400. The two ends and the inside of the welding section 410 are pressed tightly by the pressing assembly 20. When welding, the sealing nail 400 is not likely to warp. Figure 1 and Figure 2 As shown, the pressing nail structure includes a connected connector 10 and a pressing assembly 20. The pressing assembly 20 includes a first pressing portion 21. The first pressing portion 21 is used to press the sealing nail 400 and can divide the edge of the sealing nail 400 into a plurality of spaced welding sections 410. The pressure pin structure is provided with a first pressing portion 21. After the first pressing portion 21 is pressed onto the sealing pin 400, the edge of the sealing pin 400 is divided into several welding sections 410. The two ends of the welding section 410 are pressed by the two ends of the pressure strip 211, and the inside of the welding section 410 (the part of the welding section 410 facing the center of the sealing pin 400) is pressed by the pressure strip 211. When welding the sealing pin 400, the welding section 410 can be welded first. Under the pressing force of the pressure strip 211, the tendency of the welding section 410 to warp is restricted, the flatness of the welding position is better, and compared with the spot welding pre-welding in the prior art, the welding area is larger, which prevents the sealing pin 400 from shifting during the full welding process after the pressure pin structure is removed, thereby improving the sealing of the entire sealing pin 400 welding.

[0044] Optionally, the first pressing portion 21 includes at least two pressing strips 211, each of which can be pressed against the sealing pin 400, and each of which intersects with the edge of the sealing pin 400 to form two pressure points 420, and the line connecting the two pressure points 420 is located inside the edge of the sealing pin 400. In this embodiment, Figure 2 As shown, three beading strips 211 are provided, and the three beading strips 211 divide the sealing nail 400 into three welding sections 410. In other embodiments, two beading strips 211 can also be provided, and the two beading strips 211 divide the sealing nail 400 into two welding sections 410. Of course, four, five, or more beading strips 211 can also be provided, which is not limited here.

[0045] like Figure 2 As shown, in this embodiment, two adjacent welding sections 410 are separated not only by the pressure point 420 but also by the non-first welding section 430. The appearance of the non-first welding section 430 reduces the weldable length in the pre-welding stage. In order to solve the above problem, as shown in FIG. Figure 3As shown, there are at least three beading strips 211, and at least three beading strips 211 are connected end to end. It can be understood that the pattern formed by the at least three beading strips 211 is inscribed in the circular cross section of the sealing pin 400. Therefore, in the pre-welding stage, the edge of the sealing pin 400 except the pressing point 420 is the welding section 410, so that most of the edge of the sealing pin 400 can be pre-welded. In an optional embodiment, as Figure 3 As shown, eight pressure strips 211 are provided. In other embodiments, three, four, five, six, etc. pressure strips 211 may be provided, which is not limited here.

[0046] Alternatively, as Figure 2 and Figure 3 As shown, both ends of at least one pressure strip 211 extend outward to form a second pressing portion 22, and the second pressing portion 22 is used to press the surface of the top cover 500. Through the above-mentioned arrangement, the second pressing portion 22 is set, and at the same time as the pressure strip 211 presses the sealing nail 400, the second pressing portion 22 is pressed onto the top cover 500, so that in the pressed state, the top cover 500 and the sealing nail 400 are on the same plane, preventing the pressing force from being too large, causing the sealing nail 400 to be compressed too much, and after welding with the top cover 500, the plane of the sealing nail 400 is not completely flush with the plane of the top cover 500, thereby improving the flatness of the surface of the product after welding. Among them, as Figure 2 As shown, the three pressure strips 211 are not connected end to end. After the second pressing parts 22 extend from both ends of each pressure strip 211, two adjacent second pressing parts 22 at an angle intersect, so that the pressing assembly 20 presents a frame structure with better stability.

[0047] And for Figure 3 , two beading strips 211 separated by a beading strip 211 extend outwards, so that two adjacent second pressing parts 22 intersect, so that Figure 3 The pressing assembly 20 is a square structure as a whole.

[0048] In other embodiments, in order to increase the area of ​​the pressed top cover 500, Figure 3 The second pressing parts 22 may also be extended from both ends of the first pressing part 21 where the second pressing part 22 is not provided, and this is not limited here.

[0049] Optionally, a connecting rod 30 is connected between each pressure strip 211 and the connecting member 10. Through the above arrangement, the balance of the pressure transmitted by each pressure strip 211 can be ensured.

[0050] This embodiment also provides a pressure nail device, comprising the pressure nail structure described above and a drive mechanism. A connector 10 is connected to the output end of the drive mechanism, which drives the pressure assembly 20 toward or away from the sealing nail 400. The drive mechanism provides a driving force to the pressure assembly 20, pressing it against the sealing nail 400 to achieve a pressing effect. By utilizing the pressure nail structure described above and using a welding gun for welding, the pressure nail device is less likely to warp the sealing nail.

[0051] Optionally, the driving mechanism may be a device in the prior art such as a cylinder, a linear motor, etc. that can drive the pressing assembly 20 to move in a linear direction, which is not limited here.

[0052] Preferably, the connecting member 10 is detachably connected to the output end of the driving mechanism. By detachably connecting the connecting member 10 to the output end of the driving mechanism, if the pressing assembly 20 is damaged or deformed after long-term use and cannot press the sealing pin 400 well, the connecting member 10 can be removed and replaced.

[0053] Optionally, the connector 10 and the output end of the driving mechanism are detachable through threaded connection or snap connection, etc., which is not limited here.

[0054] Example 2

[0055] In this embodiment, when the pressing assembly 20 presses the sealing nail 400, the edge of the sealing nail 400 can also be divided into a plurality of spaced welding segments 410. The difference is that the form is different from that of the first embodiment. Specifically, Figure 4 As shown, the first pressing part 21 is a plate. Figure 4 and Figure 5 As shown, the three straight sides of the first pressing portion 21 serve to limit the interior of the welding section 410 . Compared with the frame structure, the plate-like structure has a larger pressing area and higher stability.

[0056] Alternatively, as Figure 5 As shown, the pressing assembly 20 further includes a third pressing portion 23, which is connected to the first pressing portion 21 and is manufactured integrally with the first pressing portion 21. The third pressing portion 23 is used to press the surface of the top cover 500. The pressing assembly 20 is an overall flat plate, and the flat plate has a larger pressing area and better pressing stability than a strip. The function of the third pressing portion 23 is similar to that of the second pressing portion 22 in Example 1 and will not be further described here.

[0057] Optionally, the plate may also be Figure 3 The pressing component 20 is based on the quadrilateral plate obtained by setting the interior to be non-hollow, which is not limited here.

[0058] Example 3

[0059] In this embodiment, when the pressing assembly 20 presses the sealing nail 400, the edge of the sealing nail 400 can also be divided into a plurality of spaced welding segments 410. The difference is that the form is different from that of the first embodiment. Specifically, Figure 6 and Figure 7 As shown, the first pressing part 21 includes a first pressing piece 212 and at least two second pressing pieces 213. The first pressing piece 212 is connected to the connecting piece 10, and the first pressing piece 212 is used to press the inside of the sealing nail 400; at least two second pressing pieces 213 are both connected to the first pressing piece 212 and are arranged at intervals along the circumference of the first pressing piece 212. The second pressing pieces 213 can press the sealing nail 400 and separate the edge of the sealing nail 400 into several welding sections 410.

[0060] Preferably, the first pressing member 212 is cylindrical and has a diameter smaller than the diameter of the head of the sealing pin 400. This ensures that when the first pressing member 212 is pressed against the sealing pin 400, it is at the same distance from the edge of the sealing pin 400, ensuring that the first pressing member 212 suppresses the tendency of the welding section 410 to tilt more evenly. Of course, in other embodiments, the shape of the first pressing member 212 can also be triangular or polygonal, as long as it ensures that when the sealing pin 400 is pressed, the first pressing member 212 presses inside the edge of the sealing pin 400.

[0061] In this embodiment, six second pressing members 213 are provided, and these six second pressing members 213 are evenly distributed around the circumference of the first pressing member 212. This ensures that the lengths of each welding segment 410 are equal, thereby ensuring balanced circumferential welding stress on the sealing pin 400 after pre-welding. Of course, the number of second pressing members 213 can be flexibly adjusted based on actual conditions.

[0062] Preferably, if Figure 6 As shown, the pressing assembly 20 also includes a fourth pressing portion 24, which is formed by the second pressing piece 213 extending in a direction away from the first pressing piece 212. The fourth pressing portion 24 is used to press the surface of the top cover 500, that is, the pressing assembly 20 presses the top cover 500 and the sealing pin 400 at the same time. The function of the fourth pressing portion 24 is the same as that of the second pressing portion 22 in Example 1, and will not be repeated here.

[0063] Alternatively, as Figure 7 As shown, the pressing assembly 20 further includes a reinforcing member 25, one end of which is connected to the first pressing member 212, and the other end is connected to the peripheral side of the first pressing member 212. Through the above arrangement, the reinforcing member 25 provides a supporting force for the second pressing member 213, preventing the second pressing member 213 from being pressed too many times and causing the flatness to deteriorate.

[0064] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Press nail structure, characterized in that, The invention comprises a connected connecting piece (10) and a pressing assembly (20), wherein the pressing assembly (20) comprises a first pressing portion (21), wherein the first pressing portion (21) is used to press against a sealing pin (400) and can divide the edge of the sealing pin (400) into a plurality of spaced welding sections (410).

2. The pressure nail structure according to claim 1, characterized in that: The first pressing portion (21) includes at least two pressing strips (211), each of the pressing strips (211) can be pressed on the sealing pin (400), and each of the pressing strips (211) intersects with the edge of the sealing pin (400) to form two pressure points (420), and the line connecting the two pressure points (420) is located inside the edge of the sealing pin (400).

3. The pressure nail structure according to claim 2, characterized in that: Both ends of at least one of the pressure strips (211) extend outward to form a second pressing portion (22), and the second pressing portion (22) is used to press the surface of the top cover (500).

4. The pressure nail structure according to claim 2, characterized in that: At least three of the pressure strips (211) are provided, and the at least three pressure strips (211) are connected end to end.

5. The press-nail structure according to any one of claims 2 to 4, characterized in that: A connecting rod (30) is connected between each of the pressure strips (211) and the connecting member (10).

6. The pressure nail structure according to claim 1, characterized in that: The first pressing portion (21) is constructed as a plate.

7. The pressure nail structure according to claim 6, characterized in that: The pressing assembly (20) further includes a third pressing portion (23), which is connected to the first pressing portion (21) and is a plate member manufactured integrally with the first pressing portion (21). The third pressing portion (23) is used to press the surface of the top cover (500).

8. The pressure nail structure according to claim 1, characterized in that: The first pressing portion (21) comprises: a first pressing member (212) connected to the connecting member (10), the first pressing member (212) being used to press the inside of the sealing nail (400); At least two second pressing members (213) are connected to the first pressing member (212) and are arranged at intervals along the circumference of the first pressing member (212). The second pressing members (213) can press the sealing pin (400) and separate the edge of the sealing pin (400) into a plurality of welding sections (410).

9. The pressure nail structure according to claim 8, characterized in that: The pressing assembly (20) further includes a fourth pressing portion (24), which is formed by the second pressing member (213) extending in a direction away from the first pressing member (212), and is used to press the surface of the top cover (500).

10. The nail pressing device is characterized in that: It comprises a driving mechanism and a pressing nail structure according to any one of claims 1 to 9, wherein the connecting member (10) is detachably connected to the output end of the driving mechanism, and the driving mechanism can drive the pressing assembly (20) to approach or move away from the sealing nail (400).

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