Split type sealing jig

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a split type sealing jig and a combined cap body used for mould pressing of a battery, the split type sealing jig comprises an outer mould pressing part and an inner mould pressing part, the outer mould pressing part is arranged on an outer ring of a sealing jig main body, an anti-explosion aluminum sheet used for mould pressing of the combined cap body is arranged, and the inner mould pressing part is sleeved by the outer mould pressing part. The section, away from the aluminum ring, of the inner molded part is in threaded connection with the outer molded part so as to adjust the relative positions of the inner molded part and the outer molded part in the axial direction, and after the positions of the inner molded part and the outer molded part are adjusted, the section, close to the aluminum ring, of the inner molded part is pressed by a reinforcing bolt penetrating through the outer molded part in the radial direction. The outer side of the end, facing the aluminum ring, of the inner mold pressing part is an inclined face formed by recessing back to the aluminum ring, and the inclined face is attached to the aluminum ring in the mold pressing process so as to press the aluminum ring. The technical problems that in the prior art, time and labor are wasted and cost is high due to the fact that jigs need to be manufactured independently in each batch of combined cap body forming are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and particularly relates to a split sealing jig. Background Art

[0002] During the forming process of the combined cap body of the battery, the explosion-proof aluminum sheet on the outer ring and the aluminum ring arranged inside the explosion-proof aluminum sheet are formed together in the last step. However, when the aluminum ring is stamped and formed with a closed end, for the aluminum rings with closed ends completed in different batches, due to production batch differences, there are different stretching differences in their forming sizes. Specifically, the height dimensions of the vertical sections of the aluminum rings are different. This vertical section needs to be pressed together with the explosion-proof aluminum sheet by the jig during the forming process of the combined cap body. Due to the differences between product batches, it will result in the inability to achieve the synchronous satisfaction effect of the inner diameter of the aluminum ring after closing the end and the edge height of the explosion-proof aluminum sheet. If one of the dimensions needs to be adjusted, the angle of the jig must be modified. In this way, a jig needs to be separately made for each batch of combined cap bodies, which is time-consuming, laborious and costly. Summary of the Invention

[0003] In order to solve the technical problems of time-consuming, laborious and high cost caused by separately making a jig for each batch during the forming of the combined cap body in the prior art, this application proposes a split sealing jig to solve the above technical problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] The utility model provides a split sealing jig for molding the combined cap body of a battery, including: an outer molding part, which is arranged on the outer ring of the main body of the sealing jig and is used for molding the explosion-proof aluminum sheet of the combined cap body; an inner molding part, which is sleeved by the outer molding part. One section of the inner molding part far from the aluminum ring is screwed with the outer molding part to adjust the relative position of the two in the axial direction. After adjusting the positions of the two, one section of the inner molding part close to the aluminum ring is pressed by a reinforcing bolt that radially penetrates the outer molding part. At the same time, the outer side of the end of the inner molding part facing the aluminum ring is an inclined surface formed by being recessed away from the aluminum ring, and the inclined surface fits on the aluminum ring during the molding process to press the aluminum ring.

[0006] Further, a plurality of through holes along the radial direction are opened on the side wall of the outer molding part, and screw threads matching with the reinforcing bolt are tapped in the through holes.

[0007] Further, it also includes a ejector rod arranged at the center of the main body of the sealing jig. The ejector rod penetrates the inner molding part and is in sliding fit with the inner molding part.

[0008] Further, a section of the outer wall of the ejector rod close to the aluminum ring is formed as a non-circular driving surface. At the same time, a driven surface adapted to the shape of the driving surface is formed on a section of the inner wall of the inner die pressing part that cooperates with the driving surface, so that the inner die pressing part can be driven to rotate when the ejector rod rotates.

[0009] Further, the driving surface and the driven surface are formed as hexagonal surfaces that cooperate with each other.

[0010] Further, a pressing part made of a non-metallic material is fixed to one end of the ejector rod close to the combined cap body. During the die pressing process of the combined cap body, the pressing part is pressed on the connecting aluminum sheet of the combined cap body.

[0011] Further, the pressing part is screwed onto the ejector rod. After screwing, the pressing part is locked by a locking pin that radially penetrates the ejector rod, so that no relative movement occurs between the pressing part and the ejector rod.

[0012] Further, a cross-shaped groove is formed on the pressing surface of the pressing part.

[0013] Further, one end of the ejector rod away from the combined cap body protrudes from the outer die pressing part to form a protruding end, and an elastic member is arranged on the protruding end.

[0014] Further, the elastic member is a spring sleeved on the ejector rod.

[0015] Based on the above technical solutions, the technical effects that the present utility model can achieve are as follows:

[0016] For the split-type sealing jig of the present utility model, the sealing jig is designed to be split-type, and the outer die pressing part and the inner die pressing part are screwed together, so that the inner die pressing part can perform axial movement relative to the outer die pressing part. In this way, when die pressing combined cap bodies of different batches, there is no need to make a new jig. Only by adjusting the axial relative distance between the outer die pressing part and the inner die pressing part, the split inner diameter of the aluminum ring and the height of the edge of the explosion-proof aluminum sheet can be adjusted in a two-way balanced manner, reducing the cost, achieving a dynamic balance state. To prevent the inner die pressing part from loosening during the die pressing process, a reinforcing bolt is used to radially penetrate the outer die pressing part and press it against the outer wall of the inner die pressing part to hold the inner die pressing part and prevent it from falling off and causing damage to the combined cap body and the jig. At the same time, the outer side of the end of the inner die pressing part facing the aluminum ring is an inclined surface formed by being recessed away from the aluminum ring. The inclined surface fits on the aluminum ring during the die pressing process to press the aluminum ring. The function of this inclined surface is to cooperate with the axial movement of the inner die pressing part, so that part of the inclined surface can always press on the aluminum ring to complete the die pressing action. In summary, the split-type sealing jig of the present utility model reduces the die pressing stations, improves the working efficiency, reduces the defective rate of products, and solves the technical problems of time-consuming, laborious, and high cost caused by the need to separately manufacture jigs for each batch of combined cap body forming in the prior art. Description of the Drawings

[0017] Figure 1 This is a schematic diagram of the overall structure of the split sealing fixture of the present utility model before the aluminum ring is die - pressed;

[0018] Figure 2 This is a schematic diagram of the overall structure of the split sealing fixture of the present utility model after the aluminum ring is die - pressed.

[0019] In the present utility model: 100 - explosion - proof aluminum sheet, 200 - aluminum ring, 300 - connecting aluminum sheet; 1 - outer die - pressing part, 11 - through - hole; 2 - inner die - pressing part, 21 - inclined surface, 22 - driven surface; 3 - ejector rod, 31 - elastic part, 32 - driving surface; 4 - pressing part, 41 - cross - shaped groove. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0021] As Figure 1-2 shown, the present utility model provides a split sealing fixture for die - pressing the combined cap of a battery, including an outer die - pressing part 1 and an inner die - pressing part 2. The outer die - pressing part 1 is arranged on the outer ring of the sealing fixture main body and is used for die - pressing the explosion - proof aluminum sheet 100 of the combined cap. The inner die - pressing part 2 is sleeved by the outer die - pressing part 1. One end of the inner die - pressing part 2 far from the aluminum ring 200 is screwed with the outer die - pressing part 1 to adjust their relative positions in the axial direction. After adjusting their positions, one end of the inner die - pressing part 2 close to the aluminum ring 200 is pressed by a reinforcing bolt that penetrates the outer die - pressing part 1 radially. In this embodiment, there are three reinforcing bolts. At the same time, the outer side of the end of the inner die - pressing part 2 facing the aluminum ring 200 is an inclined surface 21 formed by being recessed away from the aluminum ring 200. The inclined surface 21 fits on the aluminum ring 200 during the die - pressing process to press the aluminum ring 200.

[0022] The split - type sealing jig of the present utility model designs the sealing jig as a split type. The outer die pressing part 1 and the inner die pressing part 2 are screwed together, enabling the inner die pressing part 2 to perform axial movement relative to the outer die pressing part 1. In this way, when molding combined caps of different batches, there is no need to make a new jig. Just by adjusting the axial relative distance between the outer die pressing part 1 and the inner die pressing part 2, the split - mouth inner diameter of the aluminum ring 200 and the hemming shoulder height of the explosion - proof aluminum sheet 100 can be balanced bidirectionally, reducing the cost, achieving a dynamically balanced state. To prevent the inner die pressing part 2 from loosening during the molding process, a reinforcing bolt penetrates the outer die pressing part 1 along the radial direction and presses against the outer wall of the inner die pressing part 2 to hold the inner die pressing part 2 in place and prevent damage to the combined cap and the jig caused by its detachment. At the same time, the outer side of the end of the inner die pressing part 2 facing the aluminum ring 200 is an inclined surface 21 formed by being recessed away from the aluminum ring 200. The inclined surface 21 fits on the aluminum ring 200 during the molding process to press the aluminum ring 200. The function of the inclined surface 21 is to cooperate with the axial movement of the inner die pressing part 2, so that part of the inclined surface 21 can always press on the aluminum ring 200 to complete the molding action. In summary, the split - type sealing jig of the present utility model reduces the molding stations, improves the work efficiency, reduces the defective rate of products, and solves the technical problems of time - consuming, labor - intensive, and high - cost caused by the need to separately manufacture jigs for each batch of combined cap forming in the prior art.

[0023] In a specific embodiment of the present utility model, a plurality of through - holes 11 along the radial direction are provided on the side wall of the outer die pressing part 1, and threads adapted to the reinforcing bolts are tapped in the through - holes 11.

[0024] In a specific embodiment of the present utility model, the split - type sealing jig of the present utility model further includes a ejector rod 3 disposed at the axis of the sealing jig body. The ejector rod 3 penetrates the inner die pressing part 2 and is slidably engaged with the inner die pressing part 2.

[0025] Further, a non - circular driving surface 32 is formed on the outer wall of a section of the ejector rod 3 close to the aluminum ring 200. At the same time, a driven surface 22 adapted to the shape of the driving surface is formed on a section of the inner wall of the inner die pressing part 2 that cooperates with the driving surface 32, so that when the ejector rod 3 rotates, it can drive the inner die pressing part 2 to rotate. By rotating the ejector rod 3, the rotation of the inner die pressing part 2 is driven, thereby adjusting the relative distance between the inner die pressing part and the aluminum ring 200 of the battery cap body.

[0026] In a specific embodiment of the present utility model, the driving surface 32 and the driven surface 22 are formed as mutually cooperating hexagonal surfaces.

[0027] Further, a pressing member 4 made of non-metallic material is fixed to one end of the ejector rod 3 close to the combined cap body. During the molding process of the combined cap body, the pressing member 4 presses on the connecting aluminum sheet 300 of the combined cap body. The pressing member 4 is made of non-metallic material, such as hard plastic. During the molding process of the combined cap body, by pressing on the connecting aluminum sheet 300 of the combined cap body, the pressing member 4 prevents the inward force generated after the aluminum ring 200 is closed from causing the connecting aluminum sheet 300 to bulge, resulting in product deformation and avoiding subsequent CID welding false soldering problems.

[0028] Further, the pressing member 4 is screwed onto the ejector rod 3. After screwing, the pressing member 4 is locked by a locking pin that radially penetrates the ejector rod 3, so that no relative movement occurs between the pressing member 4 and the ejector rod 3. The configuration method of the locking pin can be the same as that of the reinforcing bolt.

[0029] Further, a cross-shaped groove 41 is formed on the pressing surface of the pressing member 4 to facilitate using a tool to turn the pressing member 4, thereby turning the ejector rod 3 to drive the inner molding member 2 to rotate.

[0030] In a specific embodiment of the present invention, one end of the ejector rod 3 away from the combined cap body protrudes from the outer molding member 1 to form a protruding end, and an elastic member 31 is arranged on the protruding end. Specifically, the elastic member 31 is a spring sleeved on the ejector rod 3. The function of the spring is that during the molding process of the combined cap body, the inward force can be reduced by the spring on the upper part of the ejector rod 4 to achieve the effect of stabilizing the product.

[0031] It should be understood that the specific embodiments described above are only used to explain the present invention and are not used to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A split sealing fixture for molding the combined cap of a battery, characterized in that, Comprising: An outer die pressing part (1), which is arranged on the outer ring of the sealing jig body and is used for die pressing the explosion-proof aluminum sheet (100) of the combined cap body; An inner die pressing part (2), which is sleeved by the outer die pressing part (1). One end of the inner die pressing part (2) far away from the aluminum ring (200) is screwed with the outer die pressing part (1) to adjust the relative position of the two in the axial direction. After adjusting the positions of the two, one end of the inner die pressing part (2) close to the aluminum ring (200) is pressed by a reinforcing bolt penetrating the outer die pressing part (1) along the radial direction. At the same time, the outer side of the end of the inner die pressing part (2) facing the aluminum ring (200) is an inclined surface (21) formed by being recessed away from the aluminum ring (200), and the inclined surface (21) fits on the aluminum ring (200) during the die pressing process to press the aluminum ring (200).

2. The split-type sealing jig according to claim 1, characterized in that, A plurality of through holes (11) along the radial direction are formed on the side wall of the outer die pressing part (1), and threads matching the reinforcing bolts are tapped in the through holes (11).

3. The split sealing jig according to claim 1, characterized in that, It further includes a ejector rod (3) arranged at the axis of the sealing jig body. The ejector rod (3) penetrates the inner die pressing part (2) and is in sliding fit with the inner die pressing part (2).

4. The split sealing jig according to claim 3, wherein, One section of the outer wall of the ejector rod (3) close to the aluminum ring (200) is formed as a non-circular active surface (32). At the same time, a driven surface (22) adapted to the shape of the active surface is formed on one section of the inner wall of the inner die pressing part (2) that cooperates with the active surface (32), so that the inner die pressing part (2) can be driven to rotate when the ejector rod (3) rotates.

5. The split sealing jig according to claim 4, wherein, The active surface (32) and the driven surface (22) are formed as mutually cooperating hexagonal surfaces.

6. The split sealing fixture according to claim 5, wherein A pressing part (4) made of a non-metallic material is fixed at one end of the ejector rod (3) close to the combined cap body. During the die pressing process of the combined cap body, the pressing part (4) presses on the connecting aluminum sheet (300) of the combined cap body.

7. The split sealing jig according to claim 6, wherein, The pressing part (4) is screwed on the ejector rod (3). After screwing, the pressing part (4) is locked by a locking pin penetrating the ejector rod (3) along the radial direction, so that no relative movement occurs between the pressing part (4) and the ejector rod (3).

8. The split sealing fixture according to claim 7, wherein A cross-shaped groove (41) is formed on the pressing surface of the pressing part (4).

9. The split-type sealing jig according to claim 3, wherein, One end of the ejector rod (3) far away from the combined cap body protrudes from the outer die pressing part (1) to form a protruding end, and an elastic part (31) is arranged on the protruding end.

10. The split sealing jig according to claim 9, wherein, The elastic part (31) is a spring sleeved on the ejector rod (3).

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