Pressure relief structure and its manufacturing process, explosion-proof method

Abstract

This invention provides a pressure release structure, a manufacturing process thereof, and an explosion-proof method that realize a safe pressure release function when the pressure inside the container body is too high, thereby improving the safety and reliability of the container. [Solution] The pressure release structure includes a container body, the container body includes at least a case and a lid 12, at least a portion of the case has at least one weak area molding strip fitted into it, and / or at least one weak area molding strip 3 fitted into the lid has at least one weak area molding strip fitted into it, the lid has at least one weak area molding strip fitted into it, the thickness of the lid is greater than the fitting depth into which the weak area molding strip is fitted into the lid. The present invention protects the container body from damage by fitting the weak area molding strip into the container body to form a pressure release weak area, which will rupture or deform first when pressure is released, releasing the internal pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof pressure relief, and specifically relates to a pressure relief structure, its processing process, and an explosion-proof method.

Background Art

[0002] Regarding explosion-proof terminals, such as new energy batteries, taking new energy batteries as an example, it is required that battery structural members in new energy power batteries or energy storage power plants must activate explosion-proof when the gas pressure in the battery case reaches 0.7 MPa to 2.3 MPa. This is because before a short circuit occurs in the aluminum or steel material of the new energy battery, the battery explodes first or is charged for a long time, causing materials such as electrolytic solution to decompose and generate gas, resulting in an explosion.

[0003] Currently, explosion-proof structures, such as explosion-proof valves and imprints, are installed on the surface of the battery lid / upper cover and the case. The explosion-proof valve is assembled by a welding process, and the cost of the entire process is high and the efficiency is low. However, the method of performing explosion-proof by presenting an imprint on the surface has poor stability and defects such as different depths.

[0004] After the imprint is formed, a fragile area is formed on the surface. This fragile area is used for pressure relief after the internal pressure increases. However, in processes such as assembly and transportation, equipment mounting and operation, there are factors such as external force and vibration, which cause a risk of cracking in the fragile area, affecting the service life.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of this, the pressure relief structure, its processing process, and explosion-proof method provided by the present invention aim to solve the problems existing in the current technology.

Means for Solving the Problems

[0006] In one embodiment, the pressure relief structure provided in the present invention includes a container body, the container body including at least a case and a lid, the case having at least one weak area molding pin fitted into at least a portion of the case, and / or the lid having at least one weak area molding pin fitted into the lid, the thickness of the lid being greater than the fitting depth into which the weak area molding pin is fitted into the lid and / or the thickness of at least a portion of the case being greater than the fitting depth into which the weak area molding pin is fitted into at least a portion of the case, and when in a pressure relief state, the pressure relief weak area and the weak area molding pin are opened along the longitudinal direction of the weak area molding pin, respectively.

[0007] In some embodiments of the present application, the fragile region molding strip is fitted into at least a portion of the inner or outer surface of the case.

[0008] In some embodiments of the present application, the fragile region molding groove is fitted into any one surface of the lid in the thickness direction.

[0009] In some embodiments of the present application, the fragile region molding strip is a strip of metal molding, and at least one of the fragile region molding strips is fitted into at least a portion of the case, and at least one of the fragile region molding strips is fitted into the lid.

[0010] In some embodiments of the present application, the weak region forming groove exhibits one or a combination of either a straight groove or a curved groove.

[0011] In some embodiments of the present application, the weak region forming stripe exhibits one of the following characteristics: an equal-thickness weak region forming stripe, a locally thickened weak region forming stripe, and a serrated weak region forming stripe, so that the pressure-release weak region exhibits one of the following characteristics: an equal-thickness weak region forming stripe, a locally reduced-thickness weak region forming stripe, and a serrated weak region forming stripe.

[0012] In some embodiments of the present application, the pressure-release vulnerable region exhibits a locally thickened pressure-release portion with a gradient change at at least one end and a middle portion of the surface of the vulnerable region forming groove on the side closest to the pressure-release vulnerable region, and the middle portion and the end portion are connected by a gradient change surface, or the middle portion extends toward the end portion and is connected to the end portion via a thickening notch, so that the pressure-release vulnerable region exhibits a locally thickened pressure-release portion.

[0013] In some embodiments of the present application, the surface of the weak region forming groove on the side closest to the pressure-release weak region has several sawtooth portions that penetrate the thickness direction of the pressure-release weak region, so that the pressure-release weak region exhibits a point-type pressure-release portion.

[0014] In some embodiments of the present application, a groove is formed in which the fragile region molding groove is fitted into at least a portion of the case and / or the lid, and one end of the cross-section of the fragile region molding groove near the bottom of the groove exhibits one or more combinations of a bevel, a straight surface, an arcuate concave surface, and an arcuate convex surface.

[0015] Compared to conventional technology, the beneficial effects of the pressure release structure of the present invention are as follows:

[0016] The container body in this invention consists of a case and a lid, and is used to house and protect the internal structure. The fragile region molding strip is fitted into the case or lid so as to form a pressure-release fragile region, and can release internal pressure and protect the container body from damage by rupturing or deforming first when pressure is released. To prevent accidental rupture under normal conditions, the fitting depth of the fragile region molding strip is less than the thickness of the lid or case, and the case and lid still retain sufficient strength after the fragile region molding strip is fitted. The pressure-release fragile region is a specific area formed by the action of the fragile region molding strip, and when the internal pressure of the container exceeds a certain limit, the pressure-release fragile region opens along the longitudinal direction of the fragile region molding strip, thereby rapidly releasing the internal pressure.

[0017] On the other hand, the processing process based on the pressure release structure provided in this application is: Step S1: Set the thickness of at least a portion of the case to be greater than the fitting depth to which the fragile region molding strip is fitted into at least a portion of the case, and / or set the thickness of the lid to be greater than the fitting depth to which the fragile region molding strip is fitted into the lid. Step S2 involves fitting the weak region forming strip into at least a portion of the case and / or into the lid by pressure fitting, so as to form at least one pressure-relieving weak region within at least a portion of the case and / or within the lid, Step S3 includes sealing and connecting the case and the lid in S2 to form a container body, and when the container body is in a pressure-release state, the pressure-release vulnerable region and the vulnerable region molding groove are opened along the longitudinal direction of the vulnerable region molding groove, respectively.

[0018] In some embodiments of the present application, in S2 above, the crimping is Step S20 involves positioning the fragile region molding interlocking module at the fragile region molding interlocking supply station and feeding the fragile region molding interlocking to be molded into the fragile region molding interlocking module in order to obtain the fragile region molding interlocking in a set shape, Step S21 involves moving the fragile region molding and fitting module of S20 to the case supply station, and fitting the case to the fragile region molding and fitting module or fixing the lid to the fragile region molding and fitting module, Step S22 involves moving the fragile region molding strip molding module of S21 to the crimping station, and moving the crimping upper die located above the crimping station downward to bring it into contact with the case or the lid, thereby biasing the fragile region molding strip to be crimped into at least a portion of the case or the lid. The process includes step S23 of moving the fragile region molding interlocking molding module to the loading station and removing the case or the lid.

[0019] Compared to conventional technology, the beneficial effects of the processing process based on the pressure-relieving structure of the present invention are as follows:

[0020] In this invention, the thickness of the case and lid is greater than the insertion depth of the fragile region molding strip, and after the fragile region molding strip is inserted, it does not protrude from any surface of the inserted wall thickness, thus avoiding potential differences. Furthermore, the compression fitting process fixes the fragile region molding strip inside the case or lid to ensure that the strip is accurately inserted and protects the case or lid from damage, contributing to precise control of the insertion depth and position. At the same time, after the fragile region molding strip is inserted, a pressure-release fragile region is formed in at least a portion of the case and / or the lid, and the pressure-release fragile region and the fragile region molding strip open along the longitudinal direction of the fragile region molding strip when pressure is released, and the compression fitting process precisely controls the insertion depth, preventing the insertion from being too deep or too shallow, the pressure-release fragile region from opening at the appropriate pressure, or causing insufficient strength of the case or lid, thus avoiding unexpected rupture under normal circumstances. This invention realizes a safe pressure release function when the pressure inside the container body is too high, improving the safety and reliability of the container.

[0021] Furthermore, the explosion-proof method based on the pressure relief structure provided in the present application includes: setting the safe air pressure value and the bursting air pressure value inside the container body; when the air pressure value inside the container body reaches the bursting air pressure value, the pressure relief vulnerable area and the vulnerable area forming strip installed on the container body are opened along the longitudinal direction of the vulnerable area forming strip respectively, and a pressure relief operation is performed.

[0022] As can be understood, after the air pressure inside the container body in this embodiment reaches or exceeds the bursting air pressure value, the pressure relief vulnerable area and the vulnerable area forming strip on the container body are opened along the longitudinal direction of the vulnerable area forming strip respectively, releasing the internal pressure and avoiding safety risks. Here, the safe air pressure value is smaller than the bursting air pressure value.

Brief Description of the Drawings

[0023] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those skilled in the art. The drawings are used to illustrate the purpose of the preferred embodiments and are not considered to limit the present invention. In all the drawings, the same members are denoted by the same reference numerals. [Figure 1] It is a schematic structural view of the container body provided in the embodiment of the present invention. [Figure 2] It is a first schematic structural view of the pressure relief structure provided in the embodiment of the present invention. [Figure 3] It is a cross-sectional view of the pressure relief structure provided in the embodiment of the present invention. [Figure 4] It is a first cross-sectional view of the pressure relief vulnerable area provided in the embodiment of the present invention. [Figure 5] It is a second cross-sectional view of the pressure relief vulnerable area provided in the embodiment of the present invention. [Figure 6] It is a first schematic structural view of the vulnerable area forming strip provided in the embodiment of the present invention. [Figure 7] It is a second schematic structural view of the vulnerable area forming strip provided in the embodiment of the present invention. <00This is a schematic diagram 3 of the structure of the fragile region molding strip provided in an embodiment of the present invention. [Figure 9] This is a schematic diagram of the structure of the pressure-release penetration region and the pressure-release vulnerable region provided in an embodiment of the present invention. [Figure 10] This is a schematic diagram of a structure in which a pressure-relieving vulnerable region is provided in the lid provided in an embodiment of the present invention. [Figure 11] This is a schematic diagram of the cross-sectional structure of the fragile region molding interlock provided in an embodiment of the present invention. [Figure 12] This is a schematic diagram of the structure of a fragile region molding interlocking module provided in an embodiment of the present invention. [Figure 13] This is a schematic diagram of the structure of the knife set fixing position and the first support position provided in an embodiment of the present invention. [Figure 14] This is a schematic diagram of the structure of a strip molding machine provided in an embodiment of the present invention. [Figure 15] This is a cross-sectional view 3 of the pressure-release vulnerable region provided in an embodiment of the present invention. [Figure 16] This is a cross-sectional view 4 of the pressure-release vulnerable region provided in an embodiment of the present invention. [Figure 17] Figure 2 shows a schematic diagram of the pressure relief structure provided in an embodiment of the present invention. [Modes for carrying out the invention]

[0024] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. While the drawings show exemplary embodiments of the present disclosure, it should be understood that the disclosure can be implemented in various forms, and should not be limited to the embodiments described herein. Conversely, providing these embodiments allows for a more complete understanding of the disclosure and fully communicates its scope to those skilled in the art. It should be noted that, where inconsistent, embodiments and features of the present invention can be combined with each other. Hereinafter, the present invention will be described in detail by combining embodiments with reference to the drawings.

[0025] In Example 1, as shown in Figures 1 and 17, the pressure release structure provided in this embodiment includes a container body 1, the container body 1 having a rectangular or circular shape, the container body 1 includes at least a case 11 and a lid 12, at least one fragile area molding strip 3 is fitted into at least a portion of the case 11 so that the case 11 has a pressure release fragile area 15, and / or at least one fragile area molding strip 3 is fitted into the lid 12 so that the lid 12 has a pressure release fragile area 15, the thickness of the lid 12 is greater than the fitting depth into which the fragile area molding strip 3 is fitted into the lid 12 and / or the thickness of at least a portion of the case 11 is greater than the fitting depth into which the fragile area molding strip 3 is fitted into at least a portion of the case 11, and when in a pressure release state, the pressure release fragile area 15 and the fragile area molding strip 3 are opened along the longitudinal direction of the fragile area molding strip, respectively.

[0026] Specifically, case 11 is formed by stretching a metal sheet, and case 11 includes side walls and a bottom surface.

[0027] Preferably, the fragile region molding strip 3 is fitted into at least a portion of the inner or outer surface of the case 11.

[0028] Preferably, the fragile region molding strip 3 is fitted into any one surface of the lid 12 in the thickness direction.

[0029] Preferably, the fragile region molding strip 3 is a strip-shaped metal strip, and at least one fragile region molding strip 3 is fitted into at least a portion of the case 11, and at least one fragile region molding strip 3 is fitted into the lid 12.

[0030] Specifically, the fitting position of the vulnerable region forming groove 3 includes several installation solutions as follows.

[0031] In solution 1, at least one fragile area forming groove 3 is installed on at least one inner surface and / or outer surface of the side wall portion of case 11.

[0032] In solution 2, at least one fragile area molding groove 3 is installed on the inner and / or outer surface of the bottom portion of case 11.

[0033] In solution 3, at least one fragile region forming groove 3 is provided on any one surface of the lid 12 in the thickness direction.

[0034] In solution 4, at least one fragile area molding groove 3 is provided on at least one surface of the case 11 and / or lid 12.

[0035] As can be understood, in this embodiment, the pressure-release vulnerable region 15 and the vulnerable region molding strip 3 are both opened along the longitudinal direction of the vulnerable region molding strip 3 when the pressure-release conditions are met, ensuring that the pressure can be released in a timely manner by applying a pressure-release structure, such as a terminal battery.

[0036] As can be understood, in this embodiment, the pressure-release vulnerable region 15 of the container body 1 has a structural strength that is weaker than the structural strength of other locations where the pressure-release vulnerable region 15 is not installed, and it ruptures first when the blast pressure is reached, thereby releasing the internal pressure of the container body 1.

[0037] Preferably, there are 1 to N pressure-releasing vulnerable regions 15, the number of which can be set according to the actual pressure-releasing requirements. For example, if there are two pressure-releasing vulnerable regions 15, one of them may be installed on the inner wall of the container body 1, and the other pressure-releasing vulnerable region 15 may be installed on the outer wall of the container body 1. Of course, both pressure-releasing vulnerable regions 15 may be installed on the outer wall of the container body 1, or both may be installed on the inner wall of the container body 1.

[0038] Specifically, taking one pressure-release vulnerable region 15 as an example, as shown in Figure 15, the pressure-release vulnerable region 15 is located on the inner wall of the container body, and as shown in Figure 16, the pressure-release vulnerable region 15 is located on the outer wall of the container body.

[0039] As shown in Figure 9, the shapes in the first row of Figure 9 are, in order, "figure eight-like, L, M", the shapes in the second row are, in order, "wave, concave-like, U", and the shapes in the third row are, in order, "parallel U, at least partially intersecting U, and broken ring". As shown in Figure 10, the shapes in the first row of Figure 10 are, in order, "paper pin, cross", the shapes in the second row are, in order, "at least partially intersecting arc, and intermittent right-angle frame", and the shapes in the third row are, in order, "broken ring, and intermittent rounded corner frame". The shape of the pressure-release vulnerable region 15 can be seen from Figure 9 or Figure 10, and the shape of the pressure-release vulnerable region 15 may be any one or more combinations shown or not shown in Figure 9 and / or Figure 10. This embodiment does not cover other shapes.

[0040] Preferably, the weak area forming strip 3 is a combination of one or two straight strips and curved strips, which can be specifically selected depending on the actual situation. The shape of the weak area forming strip 3 can be seen in Figures 9 and / or 10, and it is a strip-like, flap-like structure, not a complete annular structure, so that the pressure-releasing weak area 15 can control the pressure-releasing area more precisely and release the pressure.

[0041] Specifically, the material of the container body 1 is preferably 3003-H14, with a hardness of 40-45HB and a thickness of preferably 1.5mm. The material of the weak area forming groove 3 is preferably 304 stainless steel, with a hardness of 123-200HB, with an expansion amount of 0.08-0.09mm and a width of preferably 1.10-1.15mm. The insertion depth of the weak area forming groove 3 is preferably 1.10-1.16mm, and the thickness range of the pressure-released weak area 15 after the weak area forming groove 3 is inserted is preferably 0.06mm-0.28mm.

[0042] Preferably, as shown in Figures 6 to 8, the weak region forming strip 3 exhibits one of the following characteristics: an equal-thickness weak region forming strip, a locally thickened weak region forming strip, and a serrated weak region forming strip, so that the pressure-release weak region 15 exhibits one of the following characteristics: an equal-thickness weak region forming strip, a locally reduced-thickness weak region forming strip, and a sawtooth weak region forming strip.

[0043] As can be understood, in this embodiment, by designing the weak region forming groove 3 to be of one of the following types: uniform thickness, localized thickness reduction, or sawtooth, a residual thickness gradient change corresponding to the pressure-releasing weak region 15 is formed, thereby achieving both strength and pressure-releasing function.

[0044] Furthermore, uniform-thickness weak region molding ribs are applied when stable strength and uniform stress distribution are required, ensuring uniform force bearing of the weak region molding rib 3 and avoiding failure due to localized stress concentration. Locally reduced-thickness weak region molding ribs can reduce the thickness in certain areas, providing extra pressure relief capacity to specific regions while maintaining the overall structural strength. Sawtooth weak region molding ribs guide stress to be distributed along the direction of the sawtooth, thereby improving the fatigue resistance and pressure relief of the weak region molding rib 3.

[0045] Preferably, as shown in Figure 6, the pressure-release vulnerable region 15 exhibits a locally thickened pressure-release section with a gradient change, so that at least one end and middle portion of the surface of the vulnerable region forming groove 3 on the side closest to the pressure-release vulnerable region 15 have residual thickness reduction portions 32, and the residual thickness reduction portion 32 located in the middle and the residual thickness reduction portion 32 located at the end are connected by a gradient change surface 33, and as shown in Figure 7, or as the pressure-release vulnerable region 15 exhibits a locally thickened pressure-release section, the residual thickness reduction portion 32 located in the middle extends toward the residual thickness reduction portion 32 located at the end and the two are connected via a thickening notch 34.

[0046] Specifically, the gradient change surface 33 may be an arc-shaped surface or an inclined surface, allowing the pressure to be released gradually to avoid damage due to stress concentration.

[0047] As can be understood, in this embodiment, at least one end and the middle of the lower surface of the weak region molded fitting 3 each have a residual thickness reduction portion 32, and two adjacent residual thickness reduction portions 32 are connected by a gradient change surface 33 or a thickening notch 34. When pressure is released, the internal pressure of the container body 1 is gradually released along the longitudinal direction of the weak region molded fitting 3, and by precisely controlling the pressure release area, damage due to sudden pressure changes can be avoided. At the same time, the locally thickened pressure release portion corresponding to the gradient change surface 33 effectively releases internal pressure while maintaining high structural strength during the pressure release process and without destroying the overall structure of the container. In addition, the thickening notch 34 increases the local residual thickness of the pressure release weak region 15, preventing continued tearing during pressure release.

[0048] Preferably, as shown in Figure 8, the surface of the weak region forming groove 3 on the side closest to the weak region 15 has several sawtooth portions 35 that penetrate the thickness direction of the weak region 15, so that the weak region 15 exhibits a point-type pressure release portion.

[0049] As can be understood, in this embodiment, at least a portion of some of the sawtooth portions 35 on the lower surface of the weak region forming groove 3 penetrates the pressure-release weak region 15 in the thickness direction, causing the pressure-release weak region 15 to exhibit a point-type pressure-release section, thereby enabling more uniform and controllable pressure release and avoiding the problem of local stress concentration due to a single pressure-release point.

[0050] Preferably, a fitting groove 31 is formed in at least a portion of the case 11 and / or the lid 12 by fitting the fragile region molding fitting 3, and one end of the cross-section of the fragile region molding fitting 3 near the bottom of the fitting groove 31 exhibits one or more combinations of a bevel, a flat surface, an arcuate concave surface, and an arcuate convex surface.

[0051] Specifically, as shown in Figure 11, the cross-sectional shape of the first weak area molding strip 3 in the first row in Figure 11 is a flat surface, the cross-sectional shape of one end of the second weak area molding strip 3 in the first row in Figure 11 that extends into the groove 31 is a slope or a flat surface, the cross-sectional shape of one end of the third weak area molding strip 3 in the first row in Figure 11 that extends into the groove 31 is a circular arc convex surface, the cross-sectional shape of one end of the fourth weak area molding strip 3 in the first row in Figure 11 that extends into the groove 31 is two slopes distributed at an angle, and the cross-sectional shape of one end of the fifth weak area molding strip 3 in the first row in Figure 11 that extends into the groove 31 is a circular arc concave surface. The cross-sectional shape of the weak area molding strip 3 may be either shown in Figure 11 or not shown. By designing surfaces other than flat surfaces, the thickness of the weak pressure release portion 151 can be changed, thereby allowing for more precise control of the pressure release area and pressure release.

[0052] In Example 2, this example is a processing process for fabricating the pressure-relieving structure of Example 1, and specifically includes the following steps.

[0053] In S1, the thickness of at least a portion of the case 11 is set to be greater than the insertion depth to which the fragile region molding strip 3 is fitted into at least a portion of the case 11, and / or the thickness of the lid 12 is set to be greater than the insertion depth to which the fragile region molding strip 3 is fitted into the lid 12.

[0054] In S2, Solution 1 involves fitting a weak area forming strip 3 into at least a portion of the case 11 and / or into the lid 12 by pressure fitting, so as to form at least one pressure-relieving weak area 15 within at least a portion of the case 11 and / or within the lid 12. The solution includes a container body 1 in which a pressure-release vulnerable region 15 is provided, the pressure-release vulnerable region 15 includes a vulnerable region molding strip 3 and a fitting groove 31 formed by fitting the vulnerable region molding strip 3, the bottom of the fitting groove 31 and the inner or outer wall of the container body 1 form a residual thickness pressure-release portion 151, a reinforcing member 2 fixed to the container body 1 located on the inner or outer surface of the vulnerable pressure-release region 15 (for example, the reinforcing member 2 is installed on the inner or outer wall of the container body 1), and a pressure-release penetration region 21 is provided on the reinforcing member 2 so that the reinforcing member 2 reinforces the residual thickness pressure-release portion 151 when in a pressure-release and non-pressure-release state, and at least a part of the residual thickness pressure-release portion 151 opens along the pressure-release penetration region 21 when in a pressure-release state.

[0055] In S3, the case 11 and lid 12 from S2 are sealed and connected to form the container body 1. When the container body 1 is in a pressure-release state, the pressure-release vulnerable region 15 and the vulnerable region forming groove 3 are opened along the longitudinal direction of the vulnerable region forming groove 3.

[0056] Specifically, the reinforcing member 2 takes the form of either a block or a piece.

[0057] As can be understood, in this embodiment, step S1 is set such that the thickness of at least a portion of the case 11 and / or the thickness of the lid 12 is greater than the fitting depth to which the fragile area molding strip 3 is fitted into the lid 12. When step S2 of solution 1 is adopted and the fragile area molding strip 3 is fitted into at least one of the wall thicknesses of the container body 1 by pressure fitting technique, the wall thickness is thinned locally, forming a pressure-relieving fragile area 15. Furthermore, in step S3, the pressure-relieving fragile area 15 and the fragile area molding strip 3 will rupture first when the pressure inside the container body 1 is too high, releasing the internal pressure and thereby protecting the container body from damage.

[0058] As can be understood, in step S2, when solution means 2 is adopted, the weak area molding fitting strip 3 is pressed onto the inner and / or outer surface of the container body 1, and of course the inner and outer surfaces may also be called the inner wall and outer wall, the reinforcing member 2 fixed to the container body 1 always forms structural reinforcement against the weak pressure release portion 151 when pressure is released and when no pressure is released, and continues to provide structural reinforcement protection to the pressure release weak area 15, and at the same time allows at least a part of the pressure release weak area 15 to open along the pressure release penetration area of ​​the reinforcing member 2 when pressure is released, causing tearing along a predetermined trajectory path, avoiding phenomena such as excessive tearing, protecting the structure of the entire container and achieving effective pressure release, meeting the strength requirements of various scene environments, thereby guaranteeing safety in production and use.

[0059] Specifically, in step S2, if solution means 2 is adopted, then there are 1 to N pressure release vulnerable regions 15, the number of which can be set according to the actual pressure release requirement. As shown in Figure 4, taking one pressure release vulnerable region 15 as an example, the pressure release vulnerable region 15 is installed on the inner wall of the container body 1, and as shown in Figure 5, the pressure release vulnerable region 15 is installed on the outer wall of the container body 1.

[0060] Preferably, the pressure release penetration region 21 and the pressure release vulnerable region 15 are arranged in a symmetrical manner.

[0061] As can be understood, in this embodiment, the pressure release penetration region 21 and the pressure release vulnerable region 15 are arranged in a manner that ensures that when pressure is released, the internal gas is released directly from the pressure release vulnerable region 15 through the pressure release penetration region 21, thereby optimizing the pressure release path and improving the explosion-proof effect.

[0062] As can be understood, the shape of the pressure-release penetration region 21 in this embodiment may be one or more combinations of those shown or not shown in Figure 9. The pressure-release vulnerable region 15 will then follow the shape described above so that it opens along the pressure-release penetration region 21. This embodiment does not cover other shapes.

[0063] Preferably, as shown in Figures 2 to 3, a settling groove 13 is provided in the outer wall of the container body 1. The settling groove 13 can also be understood as a settling platform, but the settling groove 13 is obtained by press molding or laser etching, and the shape of the settling groove 13 is rectangular, circular, or elliptical. The reinforcing member 2 is fixed to the settling groove 13, a weak portion 14 is formed between the bottom of the settling groove 13 and the inner wall of the container body 1, and the pressure-relieving weak region 15 is provided in the weak portion 14. The design of the settling groove 13 allows it to be used to fix the reinforcing member 2, and also allows the thickness of the pressure-relieving weak region 15 to be further reduced to meet the pressure-relieving requirements.

[0064] Specifically, the volume of the settling groove 13 is smaller than the volume of the reinforcing member 2. When the reinforcing member 2 is pressed into the settling groove 13, the reinforcing member 2 presses against the inner surface of the settling groove 13, causing it to expand and deform. Furthermore, a weak point 14 is formed between the bottom of the settling groove 13 and the inner wall of the container body 1. Simultaneously, the reinforcing member 2 is fixed to the settling groove 13 by the pressure between them.

[0065] As can be understood, in this embodiment, by fixing the reinforcing member 2 to the sedimentation groove 13, a weak portion 14 is formed for installing the pressure-release weak region 15, and structural reinforcement is provided to the pressure-release weak region 15 at the same time.

[0066] Furthermore, the reinforcing member 2 is press-fitted into the settling groove 13, and the reinforcing member 2 is fixed in place by the mutual pressing action between the inner surface of the settling groove 13 and the reinforcing member 2. This eliminates extra reinforcement steps, simplifies the installation program, and reduces production costs. After the reinforcing member 2 is fitted into the settling groove 13, the entire surface is subjected to corrosion-resistant treatment.

[0067] Furthermore, the thickness of the reinforcing member 2 is equal to the depth of the sedimentation groove 13 so that the outer surface of the reinforcing member 2 and the outer surface of the container body 1 are flush and the potential difference is eliminated. Naturally, if a potential difference exists, it can be eliminated by installing a protective layer.

[0068] Preferably, as shown in Figure 14, in S2 above, the crimping is performed. Step S20 involves positioning the fragile region molding interlocking module 4 at the fragile region molding interlocking supply station 51 and feeding the fragile region molding interlocking to be molded into the fragile region molding interlocking module 4 in order to obtain a fragile region molding interlocking 3 of a set shape. Step S21 involves moving the fragile area molding interlocking module 4 in S20 to the case supply station 52, and fitting the case 11 to the fragile area molding interlocking module 4 or fixing the lid 12 to the fragile area molding interlocking module 4. Step S22 involves moving the fragile area molding strip molding module 4 of S21 to the press-fitting station 53, and moving the press-fitting upper mold 55 located above the press-fitting station 53 downward to bring it into contact with the case 11 or lid 12, thereby biasing the fragile area molding strip 3 to be pressed into at least a portion of the case 11 or into the lid 12. The process includes step S23, which involves moving the fragile area molding interlocking molding module 4 to the loading station 54 and removing the case 11 or lid 12.

[0069] As can be understood, in this embodiment, step S20 enables the precise molding of the fragile region molding strip 3 by the fragile region molding strip molding module 4, ensuring the consistency of the final product. Step S21 enables the precise fitting of the case 11 or lid 12 to the container body 1 by precisely controlling the position of the fragile region molding strip molding module 4. Step S22 moves the fragile region molding strip molding module 4 to the press-fitting station 53, precisely aligns it, ensures that the fragile region molding strip 3 can be press-fitted to the specified position, and applies pressure by moving downward with the press-fitting upper die 55 to press-fit the fragile region molding strip 3 to the case 11 or lid 12, achieving precise assembly. Step S23 moves the fragile region molding strip molding module 4 to the loading station 54, effectively removing the case 11 or lid 12, closing the case 11 with the lid 12, and finally forming the complete container body 1.

[0070] Preferably, in step S2, the fitting equipment used for press fitting includes a turntable 5, and the fragile region forming fitting module 4 in step S20 is installed on the turntable 5.

[0071] Preferably, the fragile region molding interlocking module 4 comprises multiple sets, and as the turntable 5 rotates, the fragile region molding interlocking module 4 passes sequentially through the fragile region molding interlocking supply station 51, the case supply station 52, the press-fitting station 53 and the preparation station 54 in a first rotational direction, and the fitting equipment further includes a press-fitting upper mold 55 located above the press-fitting station 53.

[0072] Preferably, the turntable 5 is connected to a rotation drive unit.

[0073] Specifically, the rotary drive module may be a stepping motor or a direct-drive motor.

[0074] As can be understood, in this embodiment, the fitting device uses a rotary drive module to control the rotation of the turntable 5, and the fragile region forming fitting module 4 passes through different stations in sequence to complete the fitting process of the fragile region forming fitting 3 and to form the markings, i.e., the pressure-released fragile region 15. Through the cooperation of the turntable 5, the fragile region forming fitting module 4, the rotary drive module, the pressure fitting upper die 55, and each station, efficient fitting and automated processing of the fragile region forming fitting 3 are achieved.

[0075] Preferably, as shown in FIG. 12, the fragile area forming strip forming module 4 in step S20 includes a mold 41, and a strip bending forming groove 42 is provided in the mold 41. One end of the strip bending forming groove 42 in the longitudinal direction is closed, and the other end extends to the side surface of the mold 41 and communicates with the outside. By communicating with the outside, for example, continuous supply of the raw material of the fragile area forming strip 3 and intermittent forming operations (for example, cutting according to a set length) can be performed. The material of the raw material of the fragile area forming strip 3 is preferably 304 stainless steel, the hardness is 123 - 200 HB, the expansion amount of the raw material of the fragile area forming strip 3 is 0.08 - 0.09 mm, and the width is preferably 1.10 - 1.15 mm.

[0076] Specifically, the strip bending forming groove 42 can be installed according to the actual situation and can be of any shape such as "S", "U", "H", "+", etc. This embodiment does not limit this.

[0077] As can be understood, the strip bending forming groove 42 in this embodiment can ensure that the fragile area forming strip 3 extends along a desired path and can maintain an accurate shape without deformation during the forming of the fragile area forming strip 3. At the same time, one end of the strip bending forming groove 42 is closed, which guarantees that the fragile area forming strip 3 does not slide or shift during forming, controls the movement stroke of the fragile area forming strip 3, and contributes to accurate positioning and accurate forming of the position of the fragile area forming strip 3. The other end of the strip bending forming groove 42 communicates with the side surface of the mold 41 and the outside, enabling the fragile area forming strip 3 to enter the forming groove from the outside and contributing to subsequent processing operations, thereby improving production efficiency.

[0078] Preferably, the fragile area forming strip forming module 4 further includes a strip input guide 43 for continuously conveying the fragile area forming strip 3, and the output end of the strip input guide 43 communicates with the other end of the strip bending forming groove 42.

[0079] Specifically, as shown in Figure 13, a first support position 45 is provided on the mold 41 to support the groove input guide 43. The first support position 45 can be understood as a stepped position, which ensures that the height of the groove input guide 43 remains constant from this position onward, thereby ensuring the transport stability of the raw material in the fragile region of the molded groove 3.

[0080] As can be understood, in this embodiment, the tack input guide 43 is used to input the fragile region shaped tack 3 into the tack curvature shaped groove 42. By using the tack input guide 43 instead of manual work, the level of automation is improved, machine downtime is reduced, production efficiency is increased, and consistency in product quality is ensured.

[0081] Preferably, as shown in Figures 12 and 14, the thread-fitting input guide 43 performs alternating oscillating or linear motion between the feed position and the release position in a plane perpendicular to the vertical axis Z-axis. Taking the linear motion as an example, a linear displacement occurs between the feed position and the release position of the thread-fitting input guide 43, and the thread-fitting input guide 43 can be driven by mechanical drive. For example, a drive method such as driving an air cylinder, a hydraulic cylinder, or a linear motor can be used.

[0082] By implementing the above system, it is possible to prevent positional interference problems such as displacement of the thread input guide 43 relative to the mold 41.

[0083] When the tack input guide 43 performs continuous transport, the length of the tack curvature forming groove 42 is set according to the length of the fragile region forming tack 3, and a tack cutting mechanism 44 is installed at the point where the tack curvature forming groove 42 and the tack input guide 43 communicate.

[0084] As can be understood, in this embodiment, the thread input guide 43 located at the supply position inputs the fragile region forming thread 3 into the thread curvature forming groove 42. When one end of the fragile region forming thread 3 contacts the closed end of the thread curvature forming groove 42, the thread cutting mechanism 44 cuts the fragile region forming thread 3 at the tip of the other end of the thread curvature forming groove 42. At the same time, the thread input guide 43 moves from the supply position to the release position by a rocking or linear motion, moving the mold 41 to the next station to perform subsequent operations.

[0085] Preferably, the rib cutting mechanism 44 includes a shearing knife set 441 (purchased directly from the market) and a driver 442 that drives the shearing knife set 441 to perform a shearing motion. The shearing knife set 441 is of the double-edged type and is fixed to the mold 41 and positioned between the other end of the rib curving molding groove 42 and the output end of the rib input guide 43.

[0086] Specifically, the drive unit 442 is one of the following: an air cylinder, a hydraulic cylinder, or a linear motor.

[0087] Specifically, a knife set fixing position 46 for supporting the shear knife set 441 is installed in the mold 41. The knife set fixing position 46 can be understood as a stepped position, which ensures the fixing stability of the shear knife set 441.

[0088] As can be understood, the rib cutting mechanism 44 in this embodiment is composed of two opposing blades responsible for the cutting operation and can efficiently cut the material of the weak area forming rib 3. The driver 442 provides power to the shearing knife set 441, enabling the rib cutting mechanism 44 to perform precise cutting operations. In addition, the double-edged shearing knife set 441 has two relatively parallel blades and can shear the weak area forming rib 3 from two directions simultaneously, improving cutting efficiency and accuracy.

[0089] By repeating the above operation, the fragile region molding groove 3 can be intermittently formed in different molds 41.

[0090] Preferably, the thread-fitting input guide 43 and the drive unit 442 at the feed position are distributed at an angle, for example, a right angle. That is, the linear displacement of the thread-fitting input guide 43 at this time does not collide with the drive unit 442, ensuring the safety of each in use.

[0091] As can be understood, in this embodiment, the threading input guide 43 and the drive unit 442 are distributed at an angle, the drive unit 442 drives the shearing knife set 441 to facilitate cutting the threads 3, and the threading input guide 43 avoids collision with the drive unit 442 when switching positions between the supply position and the relief position, ensuring that the processing of the threading forming module 4 is carried out regularly and improving production efficiency.

[0092] In Example 3, the explosion-proof method provided in this example is based on the pressure release structure of Example 1, and the explosion-proof method is The steps include setting the safety pressure value and explosion pressure value inside the container body 1, The procedure includes the step of performing a pressure release operation, wherein when the pressure inside the container body 1 reaches the explosion pressure, the pressure release vulnerable region 15 and the vulnerable region forming groove 3 installed in the container body 1 are opened along the longitudinal direction of the vulnerable region forming groove 3, the safe pressure value is less than the explosion pressure, and taking a new energy power battery as an example, the explosion pressure is between 0.7 MPa and 2.3 MPa.

[0093] As can be understood, after the internal pressure of the pressure release structure in this embodiment exceeds the explosion pressure value, the pressure release vulnerable region 15 and the vulnerable region molding groove 3 in the container body 1 open along the longitudinal direction of the vulnerable region molding groove 3, respectively, releasing the internal pressure and avoiding safety risks.

[0094] Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and are not limiting thereto. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that specific embodiments of the present invention can still be modified or replaced with equivalents, and any modification or replacement that does not depart from the spirit and scope of the present invention should be within the scope of protection of the claims of the present invention. [Explanation of Symbols]

[0095] 1. Container body, 11. Case, 12. Lid, 13. Settling groove, 14. Weak area, 15. Pressure release weak area, 151. Residual thickness pressure release area, 2. Reinforcement member, 21. Pressure release penetration area, 3. Weak area forming groove, 31. Groove, 32. Residual thickness reduction area, 33. Gradient change surface, 34. Thickening notch, 35. Sawtooth section, 4. Weak area forming groove forming module, 41. Mold, 42. Groove curving forming groove, 43. Groove input guide, 44. Groove cutting mechanism, 441. Shearing knife set, 442. Drive unit, 45. First support position, 46. Knife set fixed position, 5. Turntable, 51. Weak area forming groove supply station, 52. Case supply station, 53. Press-fit station, 54. Preparation station, 55. Press-fit upper mold.

Claims

1. The container body (1) is a pressure-relieving structure comprising at least a case (11) and a lid (12), wherein at least a portion of the case (11) is fitted with at least one weak area molding groove (3) that causes at least a portion of the case (11) to have a pressure-relieving weak area (15), and / or at least one weak area molding groove (13) that causes the lid (12) to have a pressure-relieving weak area (15), and the lid (12 A pressure-relieving structure characterized in that the thickness of the weak region molding groove (3) is greater than the insertion depth into which the weak region molding groove (3) is fitted into the lid (12) and / or the thickness of at least a part of the case (11) is greater than the insertion depth into which the weak region molding groove (3) is fitted into at least a part of the case (11), and when in a pressure-relieving state, the pressure-relieving weak region (15) and the weak region molding groove (3) each open along the longitudinal direction of the weak region molding groove (3).

2. The pressure relief structure according to claim 1, characterized in that the weak region molding groove (3) is fitted into at least a portion of the inner or outer surface of the case (11).

3. The pressure relief structure according to claim 1, characterized in that the weak region molding groove (3) is fitted into any one surface of the lid (12) in the thickness direction.

4. The pressure relief structure according to claim 1, characterized in that the weak area molding strip (3) is a strip-shaped metal strip, at least one of the weak area molding strips (3) is fitted into at least a part of the case (11), and at least one of the weak area molding strips (3) is fitted into the lid (12).

5. The pressure release structure according to claim 1, characterized in that the weak region forming groove (3) exhibits one or a combination of either a straight groove or a curved groove.

6. The pressure relief structure according to claim 1, characterized in that the pressure relief vulnerable region (15) exhibits one of the following: an equal-thickness pressure relief portion, a locally thickened pressure relief portion, and a point-cut pressure relief portion, and the vulnerable region forming groove (3) exhibits one of the following: an equal-thickness vulnerable region forming groove, a locally reduced-thickness vulnerable region forming groove, and a sawtooth vulnerable region forming groove.

7. The pressure relief structure according to claim 6, characterized in that, so as to give the pressure relief vulnerable region (15) a gradient-changing local thickening pressure relief section, at least one end and middle portion of the surface of the vulnerable region forming groove (3) on the side closer to the pressure relief vulnerable region (15) each have a residual thickness reduction portion (32), and the residual thickness reduction portion (32) located in the middle and the residual thickness reduction portion (32) located at the end are connected by a gradient-changing surface (33), or so as to give the pressure relief vulnerable region (15) a local thickening pressure relief section, the residual thickness reduction portion (32) located in the middle extends toward the residual thickness reduction portion (32) located at the end and the two are connected via a thickening notch (34).

8. The pressure relief structure according to claim 6, characterized in that the surface of the weak region forming groove (3) on the side closest to the pressure relief weak region (15) has several sawtooth portions (35) that penetrate the thickness direction of the pressure relief weak region (15) so that the pressure relief weak region (15) exhibits a point-type pressure relief portion.

9. The pressure relief structure according to claim 1, characterized in that a fitting groove (31) is formed in at least a part of the case (11) and / or the lid (12) by fitting the vulnerable region molding fitting (3), and one end of the cross-section of the vulnerable region molding fitting (3) near the bottom of the fitting groove (31) exhibits one or more combinations of a slope, a straight surface, an arcuate concave surface, and an arcuate convex surface.

10. Step S1 is to set the thickness of at least a portion of the case (11) to be greater than the fitting depth to which the fragile region molding strip (3) is fitted into at least a portion of the case (11), and / or set the thickness of the lid (12) to be greater than the fitting depth to which the fragile region molding strip (3) is fitted into the lid (12), Step S2 involves fitting the weak area forming strip (3) into at least a portion of the case (11) and / or into the lid (12) by pressure fitting, so as to form at least one pressure-relieving weak area (15) within at least a portion of the case (11) and / or within the lid (12), A processing process based on a pressure-releasing structure according to claim 1, characterized in that it includes step S3, in which the case (11) and the lid (12) in S2 are sealed and connected to form a container body (1), and when the container body (1) is in a pressure-releasing state, the pressure-releasing vulnerable region (15) and the vulnerable region forming groove (3) are each opened along the longitudinal direction of the vulnerable region forming groove (3).

11. In S2 above, the crimping is Step S20 involves positioning the fragile region molding interlocking module (4) at the fragile region molding interlocking supply station (51) and feeding the fragile region molding interlocking to be molded into the fragile region molding interlocking module (4) in order to obtain the fragile region molding interlocking (3) of the set shape, Step S21 involves moving the fragile region molding interlocking module (4) from S20 to the case supply station (52), and fitting the case (11) onto the fragile region molding interlocking module (4) or fixing the lid (12) to the fragile region molding interlocking module (4), Step S22 involves moving the fragile region molding strip molding module (4) of S21 to the press-fitting station (53), and moving the press-fitting upper mold (55) located above the press-fitting station (53) downward to bring it into contact with the case (11) or the lid (12), thereby biasing the fragile region molding strip (3) to be press-fitted into at least a portion of the case (11) or the lid (12), A processing process based on a pressure-relieving structure according to 10, comprising step S23 of moving the fragile region forming interlocking molding module (4) to a loading station (54) and removing the case (11) or the lid (12).

12. The steps include setting the safety pressure value and the explosion pressure value inside the container body (1), The explosion-proof method based on a pressure release structure according to claim 1, characterized in that when the pressure inside the container body (1) reaches the explosion pressure, the pressure release vulnerable region (15) and the vulnerable region forming groove (3) installed in the container body (1) open along the longitudinal direction of the vulnerable region forming groove (3), respectively, and a pressure release operation is performed.

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