Formation nail and battery
By setting multiple spaced planes on the outer wall of the forming nail clamping part, the problems of nail slippage and deformation caused by inappropriate clamping force are solved, realizing the reliable secondary use of forming nails and reducing battery production costs.
Patent Information
- Application Number
- CN202520408155.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Existing formation staples are prone to slippage or deformation when the clamping force is not appropriate, making them unusable and increasing battery production costs.
Design a chemically formed nail with multiple spaced planes on the outer wall of its clamping part. The clamps cooperate with these planes to increase the contact area and friction, achieve a more uniform distribution of extrusion pressure, and avoid nail slippage and deformation.
By distributing extrusion pressure evenly, the formation nails are prevented from slipping and deforming, ensuring their reliability and stability and reducing battery production costs.
Smart Images
Figure CN223898581U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy technology, and more specifically, to a chemically formed nail and a battery. Background Technology
[0002] Formation pins are special components used in battery manufacturing, primarily for sealing the electrolyte filling holes. Existing formation pins typically include a clamping head and a sealing head. During the sealing process, a clamp holds the clamping head of the formation pin, then moves the formation pin towards the battery's electrolyte filling hole. The sealing head of the formation pin inserts into the filling hole and makes an interference fit with it, thus sealing the filling hole. The clamp then releases the formation pin and moves away from the battery.
[0003] In some cases, formation pins need to be repeatedly inserted and removed (e.g., when the electrolyte needs to be replaced), meaning the formation pins on the battery need to be reused. However, in practical applications, it has been found that when the clamping force applied to the formation pin is appropriate, the clamp and the formation pin are prone to slippage, resulting in irreparable marks on the formation pin, making it unusable and increasing the battery production cost. On the other hand, increasing the clamping force can easily cause the formation pin to deform or crack, resulting in cracks in the formation pin column, making it unusable and increasing the battery production cost. Utility Model Content
[0004] The purpose of this application is to provide a chemically formed nail and a battery that can solve the problem that existing chemically formed nails are prone to becoming unusable due to inappropriate clamping force.
[0005] The embodiments of this application are implemented as follows:
[0006] A first aspect of this application provides a formation nail, including a clamping head and a sealing head connected to each other. The clamping head has a clamping portion for clamping by a fixture, and the sealing head is inserted into a battery's electrolyte filling hole and is interference-fitted with the filling hole to seal it. The outer wall of the clamping portion has a plurality of spaced-apart planes that engage with the clamping surface of the fixture. This formation nail solves the problem that existing formation nails are prone to becoming unusable due to inappropriate clamping force.
[0007] As one possible implementation, the plurality of planes are arranged at intervals along the circumference of the clamping portion.
[0008] As one possible implementation, the plurality of planes are arranged at equal intervals along the circumference of the clamping portion.
[0009] As one possible implementation, the number of the planes is at least three. When the number of the planes is three, the three planes are clamped and engaged with the three clamping surfaces of the fixture in a one-to-one correspondence.
[0010] As one possible implementation, the included angle between two adjacent planes is less than or equal to 120°.
[0011] As one possible implementation, the outer wall of the clamping part also has a plurality of arc surfaces arranged at intervals, and the plurality of arc surfaces and the plurality of planes are arranged alternately in sequence.
[0012] In one possible implementation, the clamping head and the sealing head are integrally formed.
[0013] As one possible implementation, both the clamping head and the sealing head are made of rubber.
[0014] In one possible implementation, the end face of the clamping head connected to the sealing head has a fitting portion that fits against the battery.
[0015] A second aspect of this application provides a battery including the aforementioned formation staple. This formation staple solves the problem that existing formation staples are prone to becoming unusable due to inappropriate clamping force.
[0016] The beneficial effects of the embodiments of this application include:
[0017] This formation nail includes an interconnected clamping head and a sealing head. The clamping head has a clamping portion for gripping by a fixture, and the sealing head is inserted into the electrolyte filling hole of the battery and is interference-fitted with the filling hole to seal it. The outer wall of the clamping portion has multiple spaced flat surfaces that mate with the clamping surface of the fixture. Compared to the curved outer wall of traditional formation nails, the formation nail provided in this application increases the contact area and friction between the clamping portion and the fixture through the presence of flat surfaces. When the fixture clamps the formation nail, a tighter clamping effect can be formed between the flat surfaces and the clamping surface of the fixture, allowing the compressive force applied by the fixture to be more evenly distributed on the clamping portion of the formation nail, thus solving the problem that existing formation nails are easily rendered unusable due to inappropriate compressive force from the fixture. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the chemically formed nail provided in an embodiment of this application;
[0020] Figure 2 for Figure 1 The front view;
[0021] Figure 3 This is a schematic diagram of the structure of the clamp and the chemical forming screw provided in the embodiments of this application;
[0022] Figure 4 for Figure 3 The front view;
[0023] Figure 5 for Figure 4 A sectional view;
[0024] Figure 6 This is a schematic diagram of the structure of the battery and the formation nail provided in the embodiment of this application.
[0025] Icons: 100-formation nail; 10-clamping head; 11-clamping part; 111-flat surface; 112-curved surface; 12-fitting part; 20-sealing head; 200-clamp; 210-jaw; 211-clamping surface; 300-battery; 310-liquid injection hole. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] Please refer to the reference. Figures 1 to 6 This application provides a formation nail 100, including a clamping head 10 and a sealing head 20 connected to each other. The clamping head 10 has a clamping portion 11 for clamping by a clamp 200. The sealing head 20 is inserted into the electrolyte injection hole 310 of the battery 300 and is interference-fitted with the electrolyte injection hole 310 to seal the electrolyte injection hole 310. The outer wall of the clamping portion 11 has a plurality of spaced planes 111 to cooperate with the clamping surface 211 of the clamp 200 through the planes 111. This formation nail 100 can solve the problem that existing formation nails are easily rendered unusable due to inappropriate clamping force of the clamp 200.
[0030] It should be noted that, as Figure 1 and Figure 2 As shown, the formation nail 100 includes a clamping head 10 and a sealing head 20 connected to each other. The clamping head 10 is responsible for cooperating with the clamp 200 and being clamped by the clamp 200 during the sealing process so as to drive the entire formation nail 100 to move. The sealing head 20 is responsible for cooperating with the battery 300. The sealing head 20 is interference-fitted with the injection hole 310 to seal the injection hole 310, prevent electrolyte leakage, and ensure the sealing performance of the battery 300.
[0031] Based on this, in this embodiment, the outer wall of the clamping portion 11 of the clamping head 10 is provided with a plurality of spaced-apart planes 111. During the clamping process of the clamp 200 clamping the formed nail 100, these planes 111 cooperate with the clamping surface 211 of the clamp 200. Compared with the conventional curved outer wall, the presence of the planes 111 increases the contact area between the clamping portion 11 and the clamp 200. When the clamp 200 clamps the formed nail 100, the planes 111 and the clamping surface 211 of the clamp 200 can form a tighter clamping effect, so that the compressive force applied by the clamp 200 can be more evenly distributed on the clamping portion 11 of the formed nail 100.
[0032] Traditional chemically formed staples are prone to slippage when the clamping force of the fixture 200 is appropriate, resulting in irreparable marks on the chemically formed staple 100 and rendering it unusable. However, the chemically formed staple 100 provided in this application greatly increases the friction between the clamping part 11 and the fixture 200 by providing a flat surface 111 in the clamping part 11. As a result, when the clamping force provided by the fixture 200 is appropriate, the slippage phenomenon can be effectively avoided, so that the chemically formed staple 100 will not leave marks due to slippage during multiple uses, thus making it possible to reuse it.
[0033] While traditional formation nails can prevent slippage when the clamping force of the fixture 200 is increased, they are prone to deformation or cracking, resulting in column cracks and rendering them unusable. However, the formation nail 100 provided in this application has a special planar 111 design that makes the clamping force of the fixture 200 more evenly distributed, avoiding local stress concentration. Within a reasonable range of clamping force, the formation nail 100 can withstand greater forces from the fixture 200, reducing the risk of deformation and cracking caused by stress concentration. This ensures the structural integrity of the formation nail 100 during multiple insertion and removal processes, increases its reusability, and reduces the production cost of the battery 300.
[0034] like Figures 3 to 6 As shown, the clamp 200 and the formation pin 100 work together to seal the electrolyte filling hole 310 of the battery 300. Specifically, during the sealing process, the clamp 200 clamps the formation pin 100 by having its jaws 210 clamp the clamping head 10 of the formation pin 100. Specifically, the clamping surface 211 on the jaws 210 clamps the plane 111 in the clamping portion 11 on the clamping head 10. Then, the clamp 200 moves the formation pin 100 towards the side closer to the electrolyte filling hole 310 of the battery 300 until the sealing head 20 of the formation pin 100 is inserted into the electrolyte filling hole 310 and achieves an interference fit with it, thereby sealing the electrolyte filling hole 310. Then, the clamp 200 releases the formation pin 100 and moves away from the battery 300.
[0035] As one possible implementation method, such as Figure 1 and Figure 2 As shown, in this embodiment, multiple planes 111 are arranged at intervals along the circumference of the clamping portion 11.
[0036] It should be noted that the multiple planes 111 are arranged at intervals along the circumference of the clamping portion 11, meaning that these planes 111 are distributed uniformly or non-uniformly around the circumference of the clamping portion 11 according to a certain pattern and spacing. This design means that the outer wall of the clamping portion 11 is no longer a continuous smooth curved surface, but is composed of multiple plane regions 111 and the interval regions between them. When the clamp 200 clamps the formed nail 100, the clamping surface 211 of the clamp 200 will contact these planes 111. Since the planes 111 are distributed circumferentially, the compressive force of the clamp 200 can act evenly on the clamping portion 11 from multiple directions, avoiding the concentration of compressive force in a certain local area.
[0037] The multiple planes 111 arranged at intervals along the circumference increase the contact points and contact lines between the clamp 200 and the clamping part 11, resulting in a more uniform and wider distribution of frictional force. Compared to designs that only locally set the planes 111 or use other non-circumferentially distributed designs, this design of circumferentially spaced planes 111 can provide stable frictional force from all directions when the clamp 200 is clamped, effectively preventing the formation pin 100 from rotating or sliding in the clamp 200, further reducing the possibility of pin slippage, and ensuring the stability and accuracy of the formation pin 100 in the process of sealing the electrolyte injection hole 310 of the battery 300.
[0038] Because these planes 111 are arranged circumferentially, the compressive force applied by the clamp 200 can be more evenly distributed across the entire circumference of the clamping portion 11. This helps avoid excessive local stress caused by the concentration of compressive force in certain specific areas, thereby significantly reducing the risk of deformation, cracking, or columnar cracking of the formation nail 100. The more uniform force distribution allows the formation nail 100 to maintain better structural integrity when subjected to the compressive force of the clamp 200, improving its resistance to external damage, which in turn facilitates the secondary use of the formation nail 100 and reduces the cost in the battery 300 production process.
[0039] As one possible implementation method, such as Figure 1 and Figure 2 As shown, in this embodiment, multiple planes 111 are arranged at equal intervals along the circumference of the clamping portion 11.
[0040] It should be noted that the multiple planes 111 are arranged at equal intervals along the circumference of the clamping part 11, which means that multiple planes 111 are evenly distributed in the circumferential direction of the clamping part 11 of the chemically formed nail 100, and the interval between adjacent planes 111 is equal. This plane 111 design further optimizes the structure of the chemically formed nail 100, and has a high degree of symmetry and strong regularity.
[0041] The evenly spaced planes 111 enable a more precise and uniform distribution of the compressive force applied by the clamp 200 along the circumference of the clamping portion 11. Since the contact between each plane 111 and the clamp 200 is essentially the same, the compressive force can be evenly distributed across each plane 111, avoiding excessive or insufficient localized stress caused by uneven distribution of the planes 111. This further reduces the risk of localized deformation, stress concentration, and cracking of the formed nail 100, better protecting its structural integrity and facilitating its reuse.
[0042] The evenly spaced planes 111 provide a stable and consistent frictional force for the clamp 200. When the clamp 200 clamps the formation pin 100, the frictional force generated between each plane 111 and the clamping surface 211 of the clamp 200 is similar in magnitude and uniformly distributed in the circumferential direction. This allows the formation pin 100 to maintain a more stable state in the clamp 200, effectively preventing pin slippage both during insertion into the battery 300's electrolyte filling hole 310 and in subsequent potential secondary use, thus improving the reliability and stability of the formation pin 100 in sealing the electrolyte filling hole 310.
[0043] As one possible implementation method, such as Figure 2 As shown, there are at least three planes 111. When there are three planes 111, the three planes 111 are clamped and engaged with the three clamping surfaces 211 of the fixture 200 in a one-to-one correspondence.
[0044] It should be noted that when there are three planes 111, they correspond one-to-one with the three clamping surfaces 211 of the fixture 200, and this one-to-one correspondence creates a stable triangular clamping system. The three planes 111 are arranged at equal intervals around the clamping part 11, and the three clamping surfaces 211 of the fixture 200 are in close contact with these three planes 111 respectively. During the clamping process of the fixture 200, each clamping surface 211 fully contacts the corresponding plane 111, thereby generating friction and extrusion forces to ensure that the formation nail 100 is firmly clamped and to prevent the formation nail 100 from shaking or shifting in the fixture 200. This ensures the accuracy and stability of the position of the formation nail 100 when sealing the injection hole 310, while avoiding stress concentration on one or two points. This reduces the risk of deformation, cracking, or column cracking of the formation nail 100 due to excessive local stress, which helps to improve the durability of the formation nail 100, ensures that it can be reused, and thus reduces the production cost of the battery 300.
[0045] As one possible implementation method, such as Figure 2 As shown, in this embodiment, the included angle between two adjacent planes 111 is less than or equal to 120°.
[0046] It should be noted that when there are three planes 111, the three planes 111 are arranged at equal intervals along the circumference of the clamping part 11, and the included angle between two adjacent planes 111 is 120°. When there are more than three planes 111, as the number of planes 111 increases, the circumferential space is divided more evenly by the planes 111, and the included angle between two adjacent planes 111 will gradually decrease. At this time, the included angle between two adjacent planes 111 will necessarily be less than 120°. Through the above design, the uniformity and rationality of the distribution of planes 111 in the circumference of the clamping part 11 are ensured, so as to achieve a better clamping effect.
[0047] As one possible implementation method, such as Figure 1 and Figure 2 As shown, in this embodiment, the outer wall of the clamping part 11 also has a plurality of arc surfaces 112 arranged at intervals, and the plurality of arc surfaces 112 and the plurality of planes 111 are arranged alternately in sequence.
[0048] It should be noted that, in addition to the multiple spaced planes 111, the outer wall of the clamping part 11 is also provided with multiple arc surfaces 112, and these arc surfaces 112 and these planes 111 appear alternately in sequence. That is to say, in the circumferential direction of the clamping part 11, a plane 111 is followed by an arc surface 112, and then another plane 111, and so on in a cyclical arrangement.
[0049] The presence of the curved surface 112 gives the clamping part 11 a certain degree of flexibility. When the clamp 200 clamps the formed nail 100, the curved surface 112 can produce a certain degree of elastic deformation, which plays a buffering role. It can alleviate the extrusion force applied by the clamp 200 instantly, avoid damage to the formed nail 100 due to excessive extrusion force, reduce the occurrence of deformation, cracking or column cracks, thereby increasing the possibility of reusing the formed nail 100.
[0050] The curved surface 112 helps to disperse stress. During the clamping process of the clamp 200, stress tends to concentrate at the edge where the plane 111 contacts the clamp 200. The presence of the curved surface 112 changes the stress transmission path, dispersing the stress to a larger area and making the stress distribution more uniform. This helps to protect the structural strength of the forming nail 100, extend its service life, ensure good performance after multiple insertions and removals, and reduce the production cost of the battery 300.
[0051] In the actual production and manufacturing process, traditional chemical forming nails can be used to cut the curved outer wall to remove some material, thereby forming a new chemical forming nail 100 structure with multiple arc surfaces 112 and multiple planes 111 arranged alternately, which facilitates the mass production and processing of chemical forming nails 100.
[0052] As one possible implementation, the clamping head 10 and the sealing head 20 are integrally formed.
[0053] It should be noted that in traditional non-uniformly molded formation nails, stress concentration may occur at the connection between the clamping head 10 and the sealing head 20, making them prone to breakage or damage under stress. The integrally molded formation nail 100 of this application makes the entire structure of the formation nail 100 more stable and able to withstand greater external forces. Whether during clamping by the clamp 200 or when the sealing head 20 is inserted into the electrolyte filling hole 310 of the battery 300, it can better resist deformation and damage, greatly improving the durability of the formation nail 100 and providing a solid structural foundation for its secondary use. Since there are no connection gaps, the integrally molded formation nail 100 also helps to improve the sealing effect of the sealing head 20 on the electrolyte filling hole 310 of the battery 300.
[0054] In the manufacturing process, the one-piece molded forming pin 100 reduces the complexity of the assembly process, saves production time and labor costs, reduces the risk of product quality problems caused by improper assembly, and improves production efficiency and product consistency. The one-piece molded forming pin 100 also makes it easier to ensure the relative positional and dimensional accuracy between the clamping head 10 and the sealing head 20.
[0055] As one possible implementation, both the clamping head 10 and the sealing head 20 are made of rubber.
[0056] It should be noted that rubber is a material with high elasticity, good flexibility, and a certain degree of wear resistance. Therefore, when the sealing head 20 is inserted into the electrolyte injection hole 310 of the battery 300, it can fill the tiny gap between the injection hole 310 and the sealing head 20 through its own elastic deformation, achieving an excellent sealing effect, effectively preventing electrolyte leakage, and ensuring the stable performance and safety of the battery 300. During the clamping process of the clamp 200, the rubber can adaptively deform according to the shape of the clamp 200 and the applied pressure, increasing the contact area with the clamp 200, improving friction, and reducing the occurrence of slippage. Even if the extrusion pressure of the clamp 200 fluctuates within a certain range, the rubber clamping head 10 can maintain a good clamping effect, reducing the risk of damage to the formation nail 100 due to improper extrusion pressure, and facilitating the secondary use of the formation nail 100.
[0057] During the clamping or releasing of the formation pin 100 by the clamp 200, and the insertion or removal of the sealing head 20 from the injection hole 310, the elasticity of the rubber can also play a role in buffering and shock absorption. It can effectively absorb the impact force generated during operation, preventing the formation pin 100 from deforming or breaking due to excessive instantaneous force, thus extending the service life of the formation pin 100 and reducing the production cost of the battery 300. In addition, rubber usually has a certain degree of tolerance to chemicals such as electrolytes and is not likely to react with the chemicals inside the battery 300. This ensures the chemical stability of the formation pin 100 during the production and use of the battery 300, preventing corrosion and aging due to contact with electrolytes, thereby maintaining its good sealing and clamping performance.
[0058] As one possible implementation method, such as Figure 1 and Figure 2 As shown, in this embodiment, the end face where the clamping head 10 is connected to the sealing head 20 has a fitting portion 12 that fits against the battery 300.
[0059] It should be noted that the end face where the clamping head 10 connects to the sealing head 20 is provided with a contact portion 12. This contact portion 12 is designed to make tight contact with the surface of the battery 300. It is a special structural area located between the clamping head 10 and the sealing head 20, specifically designed to optimize the fit between the formation pin 100 and the battery 300. The contact portion 12 ensures a tight fit with the surface of the battery 300, thereby filling any small gaps that may exist between the clamping head 10, the sealing head 20, and the battery 300, further enhancing the sealing performance. After the sealing head 20 is inserted into the injection hole 310 to achieve initial sealing, the tight contact between the contact portion 12 and the surface of the battery 300 forms a second line of defense, effectively preventing electrolyte leakage from around the injection hole 310, ensuring the stability of the internal environment of the battery 300, and improving the overall performance and safety of the battery 300.
[0060] This application also provides a battery 300, including the aforementioned formed nail 100. Since the structure and beneficial effects of the formed nail 100 have been described in detail in the foregoing embodiments, they will not be repeated here.
[0061] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0062] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.
Claims
1. A chemically formed nail, characterized in that, The device includes a clamping head and a sealing head connected to each other. The clamping head has a clamping portion for clamping by a clamping device. The sealing head is inserted into the electrolyte filling hole of the battery and is interference-fitted with the electrolyte filling hole to seal the electrolyte filling hole. The outer wall of the clamping portion has a plurality of spaced planes that cooperate with the clamping surface of the clamping device through the planes.
2. The chemically formed nail according to claim 1, characterized in that, The plurality of planes are arranged at intervals along the circumference of the clamping portion.
3. The chemically formed nail according to claim 2, characterized in that, The multiple planes are arranged at equal intervals along the circumference of the clamping portion.
4. The chemically formed nail according to claim 1, characterized in that, The number of planes is at least three. When the number of planes is three, the three planes are clamped and engaged with the three clamping surfaces of the fixture in a one-to-one correspondence.
5. The chemically formed nail according to claim 4, characterized in that, The included angle between two adjacent planes is less than or equal to 120°.
6. The chemically formed nail according to claim 1, characterized in that, The outer wall of the clamping part also has multiple arc surfaces arranged at intervals, and the multiple arc surfaces and multiple planes are arranged alternately in sequence.
7. The chemically formed nail according to claim 1, characterized in that, The clamping head and the sealing head are integrally formed.
8. The chemically formed nail according to claim 1, characterized in that, Both the clamping head and the sealing head are made of rubber.
9. The chemically formed nail according to claim 1, characterized in that, The end face of the clamping head connected to the sealing head has a fitting portion that fits against the battery.
10. A battery, characterized in that, Includes the chemically formed nail as described in any one of claims 1 to 9.