Sealing device for steel shell of cylindrical lithium battery

Abstract

The utility model discloses a sealing device for a steel shell of a cylindrical lithium battery, and relates to the technical field of sealing of the steel shell of the cylindrical lithium battery. The device comprises a base, a fixed seat A fixedly arranged on the base, a guide rail, a fixed seat B mounted on the guide rail, and notch clamping plates mounted in the fixed seat A and the fixed seat B. According to the utility model, the fixed seat A fixedly arranged on the base and the fixed seat B arranged on the upper guide rail on the other side are arranged, the fixed seat A is matched with the fixed seat B, the fixed seat A and the fixed seat B are arranged at the bottom and are fixedly arranged on the three-jaw chuck on the base, and three groups of clamping jaws arranged in the three-jaw chuck can be loosened and tightened only by rotating the loosening and tightening knob; through double clamping of the notch clamping plate and the three-jaw chuck, the steel shell can be better clamped, and the situation that due to the fact that the position is not right, the surface of the steel shell is stressed unevenly, and the product quality is affected is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of cylindrical lithium battery steel shell sealing technology, and in particular relates to a sealing device for cylindrical lithium battery steel shell. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as positive / negative electrode materials and a non-aqueous electrolyte solution. With the rapid development of industries such as mobile phones, laptops, digital cameras, electric vehicles, power tools, and new energy vehicles in China, the demand for lithium-ion batteries will continue to grow. Furthermore, due to technological innovations by lithium-ion battery manufacturers, the demand for lithium-ion batteries will continue to increase.

[0003] Existing devices require clamping the steel shell during sealing. If the shell is not positioned directly in the center of the clamping device, uneven force will occur, resulting in insufficient clamping and leakage of the lithium battery, which will affect product quality. Furthermore, traditional devices require replacing the entire clamp when clamping different types of steel shells, which affects production efficiency. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a sealing device for the steel shell of a cylindrical lithium battery, which can effectively solve the problems of the existing technology.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a sealing device for a cylindrical lithium battery steel shell, including: a base, a fixed seat A fixed on the base, a guide rail, a fixed seat B installed on the guide rail, and slotted clamps installed inside the fixed seat A and the fixed seat B.

[0007] It also includes: a semi-circular groove is provided on one side of the fixed seat A, and a groove is provided on the side of the fixed seat A away from the semi-circular groove to allow the slotted clamp plate to pass through;

[0008] Fixed seat B and fixed seat A are two sets of fixed seats with the same structure. The guide rail is fixed on the base. Fixed seat B has a groove at the bottom that matches the guide rail, allowing fixed seat B to move along the direction of the guide rail.

[0009] The three-jaw chuck is fixed on the base and matches the circular grooves at the bottom of the fixed base A and fixed base B. The three-jaw chuck has three sets of jaws installed inside, and a control knob for tightening the jaws is also installed on one side of the three-jaw chuck.

[0010] Furthermore, a groove is provided on the side of the fixed seat B away from the fixed seat A, and the cylinder A is installed on the base away from the fixed seat A. The cylinder A is connected to the fixed seat B through a piston rod with the same internal size as the groove on one side of the fixed seat B.

[0011] Furthermore, the slot clamp is provided with a notch of the same size as the slot of the steel shell being processed. A limiting block is fixed on one side of the slot clamp that matches the groove in the fixed seat A. The top of the fixed seat A is provided with two sets of slots. The other side of the slot clamp is provided with the same slots as the fixed seat A. The fixed seat A is connected to the two sets of slots on the slot clamp by a positioning pin.

[0012] Furthermore, four sets of support columns are fixed on the base, and a top plate is also installed on the support columns. A support plate is also fixed on the top plate. Cylinder B is installed on the support plate. The support plate is installed on the support plate by means of screw holes that cooperate with cylinder B and positioning bolts.

[0013] Furthermore, the top plate is provided with a slot that allows the piston rod inside cylinder B to pass through, and an upper mold that matches the lower fixed seat A is installed on the side of the piston rod away from cylinder B.

[0014] This utility model has the following beneficial effects:

[0015] This invention features a fixed base A on the base and a fixed base B on the upper guide rail on the other side. The fixed bases A and B cooperate, utilizing two sets of slotted clamping plates that match the dimensions of the steel shell to clamp the slotted portion of the steel shell. This prevents the steel shell from shifting vertically during processing, which could lead to insufficient clamping later. A three-jaw chuck, with fixed bases A and B fixed at the bottom of the base, allows for easy tightening and loosening of the three sets of jaws by simply rotating a tightening knob. The dual clamping of the slotted clamping plates and the three-jaw chuck provides better clamping of the steel shell, reducing the risk of uneven stress on the steel shell surface due to misalignment, which could affect product quality. By making the slot clamp plate detachable, the locating pin between the connecting fixing seat B and the slot clamp plate can be removed, allowing the slot clamp plate of the same size as the slot portion of the steel shell to be processed to be replaced at any time. After replacement, since the fixing seat B has a notch that matches the slot clamp plate, the locating pin only needs to be inserted to fix the position of the slot clamp plate. During the clamping process, damage to the steel shell can also be avoided, effectively solving the problem of inconvenient replacement. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the fixing base assembly of this utility model;

[0019] Figure 3 This is an exploded view of the fixed base structure of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Base; 2. Fixed base A; 3. Fixed base B; 4. Groove clamping plate; 5. Guide rail; 6. Cylinder A; 7. Cylinder B; 8. Upper mold; 9. Support column; 10. Top plate; 11. Three-jaw chuck; 12. Tightening knob; 13. Positioning pin; 14. Support plate. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figure 1-3As shown, this utility model is a sealing device for a cylindrical lithium battery steel shell, including: a base 1, a fixed seat A2 fixed on the base 1, a guide rail 5, a fixed seat B3 installed on the guide rail 5, and a slotted clamping plate 4 installed inside the fixed seat A2 and the fixed seat B3; it also includes: a semi-circular groove is opened on one side of the fixed seat A2, and a groove is opened on the side of the fixed seat A2 away from the semi-circular groove to allow the slotted clamping plate 4 to pass through. The slotted clamping plate 4 has a notch with the same size as the slot of the steel shell being processed. A limiting block is fixed on one side of the slotted clamping plate 4 to cooperate with the groove of the fixed seat A2. Two sets of slots are also opened on the top of the fixed seat A2. The slotted clamping plate 4 has the same slots as the fixed seat A2 on the other side. The fixed seat A2 is connected to the two sets of slots on the slotted clamping plate 4 by a positioning pin 13. Two sets of guide rails 5 are fixed on the side of the base 1 away from the fixed seat A2. The bottom of the fixed seat B3 has a groove that matches the two sets of guide rails 5, allowing the fixed seat B3 to move along the direction of the guide rails 5 when it is installed on the guide rails 5. The fixed seat B3 has a groove on the side away from the fixed seat A2. The cylinder A6 is installed on the side of the base 1 away from the fixed seat A2. The cylinder A6 is connected to the fixed seat B3 through a piston rod with the same internal size as the groove on one side of the fixed seat B3. Since the fixed seat A2 and the fixed seat B3 are two sets of fixed seats with the same structure, the piston in the cylinder A6 pushes the fixed seat B3 until it contacts the fixed seat A2, thereby achieving the function of clamping the steel shell with the two sets of slotted clamps 4. The three-jaw chuck 11 is fixed on the base 1 and cooperates with the circular grooves opened on the fixed seat A2 and fixed seat B3. The three-jaw chuck 11 is fixed with three sets of jaws. The position of the jaws and the distance between them can be adjusted by simply rotating the tension knob 12 installed on one side of the three-jaw chuck 11. It can clamp the bottom of the steel shell. Through the double clamping of the three-jaw chuck 11 and the groove clamping plate 4, the position of the steel shell can be prevented from moving during processing, which would prevent it from being properly clamped later.

[0024] Four sets of support columns 9 are fixed on the base 1, and the top plate 10 is installed on the four sets of support columns 9. The top plate 10 is also provided with a slot hole that is coaxial with the center of the lower clamp. A support plate 14 is fixed on one side of the slot hole. The support plate 14 is provided with a threaded hole that mates with the cylinder B7. The cylinder B7 is installed and connected to one side of the support plate 14 by positioning bolts. The piston rod inside the cylinder B7 passes through the slot hole on the top plate 10 and connects to the upper mold 8. The diameter of the upper mold 8 is the same as the circular groove on the fixed seat A2. The piston rod inside the cylinder B7 pushes the upper mold 8 to press the steel shell clamped between the fixed seat A2 and the fixed seat B3, thereby sealing the steel shell.

[0025] Depending on the size of the steel shell being processed, the slot clamp 4 can be replaced with a model whose notch size matches the slot size of the steel shell. Simply pull out the positioning pin 13 to remove the slot clamp 4, then insert the positioning pin 13 back into the groove. The operation is very simple and convenient. During processing, first place the steel shell into the fixed seat A2, using the slot clamp 4 to hold the slot on the steel shell. Then, rotate the tension knob 12 on one side of the three-jaw chuck 11 fixed at the bottom of the fixed seat A2 to clamp the unprocessed steel shell. Drive cylinder A6 pushes the fixed seat B3 to double-clamp the steel shell, and then drive cylinder B7 uses the upper mold 8 to press the top of the steel shell, completing the processing. After processing, cylinders A6 and B7 retract their piston rods, and the processed steel shell can be removed simply by turning the tension knob 12.

[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A closure device for a cylindrical lithium battery steel can, comprising: The base (1), the fixed seat A (2) fixed on the base (1), the guide rail (5), the fixed seat B (3) installed on the guide rail (5), and the slot clamping plate (4) installed inside the fixed seat A (2) and the fixed seat B (3); It is characterized in that: a semicircular groove is formed on one side of the fixed seat A (2), and a groove is formed on the side of the fixed seat A (2) away from the semicircular groove to allow the slot clamping plate (4) to pass through; The fixed seat B (3) and the fixed seat A (2) are two groups of fixed seats with the same structure, the guide rail (5) is fixed on the base (1), and the fixed seat B (3) is provided with a groove at the bottom to cooperate with the guide rail (5), allowing the fixed seat B (3) to move along the guide rail (5); The three-jaw chuck (11) is fixed on the base (1) and cooperates with the circular grooves formed at the bottom of the fixed seat A (2) and the fixed seat B (3), and three sets of clamping jaws are installed inside the three-jaw chuck (11), and a tension knob (12) is also installed on one side of the three-jaw chuck (11) to control the clamping jaws.

2. A closure device for a cylindrical lithium battery steel can according to claim 1, characterized in that, The fixed seat B (3) is provided with a groove on the side away from the fixed seat A (2), the cylinder A (6) is installed on the side of the base (1) away from the fixed seat A (2), and the cylinder A (6) is connected with the fixed seat B (3) through the internally installed piston rod with the same size as the groove on one side of the fixed seat B (3).

3. A closure device for a cylindrical lithium battery steel can according to claim 1, characterized in that, The slot clamping plate (4) is provided with a notch with the same size as the slot of the processed steel shell, a limiting block is fixed on one side of the slot clamping plate (4) to cooperate with the groove formed in the fixed seat A (2), two groups of slot holes are formed at the top of the fixed seat A (2), and the same slot holes are formed on the other side of the slot clamping plate (4) to connect the two groups of slot holes on the fixed seat A (2) and the slot clamping plate (4) through the positioning pin (13).

4. The sealing device of a cylindrical lithium battery steel can according to claim 1, characterized in that, Four support columns (9) are fixed on the base (1), a top plate (10) is installed on the support column (9), a support plate (14) is fixed on the top plate (10), a cylinder B (7) is installed on the support plate (14), the support plate (14) is provided with screw holes matched with the cylinder B (7), and the cylinder B (7) is installed on the support plate (14) by using positioning bolts.

5. A closure device for a cylindrical lithium battery steel can according to claim 4, characterized in that, The top plate (10) is provided with a slot hole allowing the piston rod inside the cylinder B (7) to pass through, and an upper die (8) matched with the fixed seat A (2) below is installed on the side of the piston rod away from the cylinder B (7).

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