Mica cover plate with explosion venting holes and manufacturing method

Abstract

The invention discloses a mica cover plate with explosion venting holes and a manufacturing method, and relates to the technical field of new energy automobile battery pack safety protection, the mica cover plate with the explosion venting holes comprises a first mica plate, and a plurality of first explosion venting holes are formed in the top of the first mica plate; the bottom surface of the second mica plate is fixed to the top surface of the first mica plate, and second explosion venting holes are formed in the positions, corresponding to the first explosion venting holes, of the second mica plate; and a weakening line hole communicated with the first explosion venting hole is formed in the bottom of the first mica plate. Through the design of the explosion venting holes in the mica cover plate, internal high-pressure and high-temperature gas can be quickly discharged when thermal runaway of the battery occurs, a good protection effect is achieved, and the increasingly changing requirements of the new energy electric vehicle market are met.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection of battery packs for new energy vehicles, and in particular to a mica cover plate with explosion venting holes and a manufacturing method thereof. Background Art

[0002] Lithium battery packs are the core components of new energy electric vehicles. Lithium batteries will emit a large amount of heat and gas during thermal runaway. If the high-pressure and high-temperature gas cannot be released in time, the risk will easily expand and cause safety hazards to the vehicle and people. Therefore, a protective cover made of mica is often assembled inside the battery pack for insulation and heat insulation, and to meet the requirements for rapid discharge of the battery in a thermal runaway state.

[0003] The mica cover plate in the existing general technology is generally a straight plate structure with through holes. The structure is relatively simple and cannot effectively deal with the problem of insulation and high voltage resistance of the battery in the case of thermal runaway. Therefore, we propose a mica cover plate with explosion-proof holes and a manufacturing method. Summary of the invention

[0004] The purpose of the present invention is to provide a mica cover plate with explosion-proof holes and a manufacturing method. Through the design of the explosion-proof holes on the mica cover plate, the internal high-pressure and high-temperature gas can be quickly released when the battery has thermal runaway, which has a good protective effect and meets the needs of the increasingly changing new energy electric vehicle market.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mica cover plate with explosion-proof holes, comprising a first mica plate, a plurality of first explosion-proof holes being arranged on the top of the first mica plate; a second mica plate, the bottom surface of the second mica plate being fixed to the top surface of the first mica plate, second explosion-proof holes being arranged at positions of the second mica plate corresponding to the first explosion-proof holes; and a weakened line hole being arranged at the bottom of the first mica plate and connected to the first explosion-proof holes.

[0006] Preferably, the first explosion-venting hole is a blind hole, and the sum of the hole depth of the first explosion-venting hole and the hole depth of the second explosion-venting hole is equal to the thickness of the first mica board.

[0007] Preferably, both the first mica board and the second mica board are provided with positioning holes, and the positioning holes on the first mica board correspond to the positions of the positioning holes on the second mica board; the surface of the second mica board away from the first mica board is provided with a flame-retardant double-sided adhesive layer, and release paper is provided on the double-sided adhesive layer.

[0008] The present invention also discloses a method for manufacturing a mica cover plate with explosion venting holes, comprising the following steps:

[0009] S1. According to the shape, length and width of the mica cover plate product, a large sheet of mica paper raw material is cut into multiple small-sized mica papers according to the size requirements, and then the multiple mica papers are stacked according to the thickness requirements of the mica cover plate product to form raw material A (second mica board raw material) and raw material B (first mica board raw material);

[0010] S2, cold-pressing the raw material A and the raw material B through a hot press, and forming the A1 mica board and the B1 mica board into a plate-like structure after the cold pressing, wherein the thickness of the A1 mica board is greater than the thickness of the B1 mica board;

[0011] S3, machining the A1 mica board and the B1 mica board, and manufacturing the first explosion-proof hole and the second explosion-proof hole by machining according to the hole shape, size and position requirements of the mica cover plate product, wherein the front projection shape and position requirements of the first explosion-proof hole and the second explosion-proof hole are the same as the front projection of the blind hole of the mica cover plate product, and after machining is completed, the B2 mica board with the first explosion-proof hole and the A2 mica board with the second explosion-proof hole are formed;

[0012] S4, stacking the single A2 mica board and the single B2 mica board together according to the size requirements of the mica cover board product, putting them into a hot press, and hot pressing the A2 mica board and the B2 mica board into a whole, so as to obtain a C1 mica board with explosion venting holes;

[0013] S5. Machining the shape of the C1 mica board to obtain the desired mica cover board product with explosion-proof holes.

[0014] Preferably, in step S2 and step S4, the hot pressing temperature of the hot press is 100° C.-300° C., the pressure is 0-40 MPa, and the hot pressing time is 0.1 h-20 h.

[0015] Preferably, in step S3 and step S5, the method of machining the A2 mica board to produce the second explosion-proof hole or the method of machining the shape of the C1 mica board includes stamping, laser cutting and milling machine engraving.

[0016] Preferably, in step S4, the hot press machine includes: a hot press workbench, a first vertical plate and a second vertical plate parallel to the first vertical plate are fixed to the bottom of the hot press workbench; a hot press assembly, the hot press assembly is arranged above the hot press workbench and hot presses the stacked A2 mica board and the B2 mica board; a clamping mechanism, the clamping mechanism includes two groups of clamping assemblies symmetrically distributed on both sides of the hot press assembly, the two groups of clamping assemblies cooperate and are used to clamp and position the stacked A2 mica board and the B2 mica board; the clamping assembly includes: a clamping plate; a first sliding block, the top of the first sliding block and the bottom of the clamping plate are close to the The position of one edge of the clamping plate is fixed, and a first slide groove for sliding cooperation of the first sliding block is arranged through the hot pressing workbench; a second sliding block, the top of the second sliding block and the bottom of the clamping plate are fixed near the position of the other edge of the clamping plate, and a second slide groove for sliding cooperation of the second sliding block is arranged through the hot pressing workbench; a transmission plate, the top of the transmission plate is fixed to the bottom of the first sliding block, and the transmission plate and the clamping plate are arranged vertically; a limit block, the top of the limit block is fixed to the bottom of the second sliding block; the hot press machine also includes: a driving component, and the driving component is used to drive the transmission plates on both sides to approach or move away from each other.

[0017] Preferably, the transmission plates on both sides are penetrated by arc-shaped grooves; the driving assembly comprises: a first transmission rod, the first transmission rod slidingly cooperates with the arc-shaped groove on one of the transmission plates on one side; a first connecting rod, one end of the first connecting rod is fixed to the first transmission rod; a first rotating rod, the first rotating rod is rotatably mounted on the first vertical plate; a first transmission gear, the first transmission gear is fixedly sleeved on the first rotating rod, and the first transmission gear is located between the first connecting rod and the first vertical plate; a motor, the motor is fixed to the first vertical plate, the output end of the motor passes through the first vertical plate and is rotatably connected; a driving gear, the driving gear is fixed to the output end of the motor and meshes with the first transmission gear; a second rotating rod, the second rotating rod is rotatably mounted on the first vertical plate, the The first connecting rod is fixed to the end of the second rotating rod on a side away from the first transmission rod; a driven gear, the driven gear is fixedly sleeved on the second rotating rod and meshed with the driving gear; a third rotating rod, the third rotating rod is rotatably installed on the first vertical plate; a second transmission gear, the second transmission gear is fixedly sleeved on the third rotating rod and meshed with the driven gear; a second connecting rod, one end of the second connecting rod is fixed to the end of the third rotating rod, and the second connecting rod is located on the side of the second transmission gear away from the first vertical plate; a second transmission rod, the second transmission rod is fixed to one end of the second connecting rod away from the third rotating rod, the second transmission rod is located on the side of the second connecting rod away from the first vertical plate, and the second transmission rod slides with the arc-shaped groove on the side away from the first connecting rod.

[0018] Preferably, the top of the transmission plate is detachably connected to the lower mounting plate, and the bottom of the lower mounting plate and the top of the transmission plate are jointly provided with a lower roller shaft, and the lower roller shaft is movably connected to the top of the transmission plate and the bottom of the lower mounting plate, and the axis of the lower roller shaft is located on the intersection surface between the bottom of the transmission plate and the bottom of the lower mounting plate, and the top of the lower roller shaft is rollingly matched with the bottom of the hot pressing workbench; the bottom of the clamping plate is detachably connected to the upper mounting plate, and the top of the upper mounting plate and the bottom of the clamping plate are jointly provided with an upper roller shaft, and the upper roller shaft is movably connected to the bottom of the clamping plate and the top of the upper mounting plate, and the axis of the upper roller shaft is located on the intersection surface between the bottom of the clamping plate and the top of the upper mounting plate, and the upper roller shaft is rollingly matched with the top of the hot pressing workbench.

[0019] Preferably, the hot pressing assembly includes a cylinder disposed above the hot pressing workbench and a hot pressing plate fixed to the lower end of the piston rod of the cylinder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can quickly release the internal high-pressure and high-temperature gas when the battery is in thermal runaway through the design of the explosion-proof hole on the mica cover plate, which can effectively prevent the high temperature from directly acting on the vehicle cab and the back seat, has a good protective effect, and meets the needs of the ever-changing new energy electric vehicle market. This mica cover plate manufacturing process is simple and reliable, easy to operate and implement, and adopts the method of stacking hot pressing and machining by a hot press to effectively improve the quality of the mica cover plate, and can realize the assembly line operation of the mica cover plate, improve the manufacturing efficiency and product yield, and is suitable for mass production. The mica cover plate product made by this mica cover plate manufacturing process has a simple structure, good fire resistance, heat resistance, flame retardancy and electrical insulation, as well as light weight and easy processing, which can effectively improve the quality of the mica cover plate. Through the design of the explosion-proof hole on the mica cover plate, the internal high-pressure and high-temperature gas can be quickly released when the battery is in thermal runaway, which has a good protective effect and meets the needs of the ever-changing new energy electric vehicle market. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a semi-finished product of the second mica board in the present invention;

[0023] Figure 2 is a schematic diagram of a semi-finished product of the first mica board in the present invention;

[0024] Figure 3 It is a schematic diagram of the explosion of the mica cover plate in the present invention;

[0025] Figure 4 for Figure 3 Bottom view of

[0026] Figure 5 is a side view of the mica cover plate of the present invention;

[0027] Figure 6 for Figure 3 A top view of

[0028] Figure 7 for Figure 6 The enlarged schematic diagram of point A in the middle;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the hot press in the present invention;

[0030] Fig. 9 for Figure 8 A structural diagram from another perspective after deleting the first vertical board;

[0031] Fig.10 It is a structural schematic diagram for highlighting the clamping assembly of the present invention;

[0032] Fig.11 for Fig.10A magnified schematic diagram of point B in the middle.

[0033] In the figure: 1, first mica board; 11, first explosion relief hole; 12, weakening line hole; 2, second mica board; 21, second explosion relief hole; 3, positioning hole; 4, double-sided adhesive layer; 5, hot pressing workbench; 51, first vertical plate; 52, second vertical plate; 53, first slide; 54, second slide; 6, hot pressing assembly; 61, cylinder; 62, hot pressing plate; 7, clamping assembly; 71, clamping plate; 72, first sliding block; 73, second sliding block; 74, transmission plate; 74 1. arc-shaped groove; 75. limit block; 8. driving assembly; 81. first transmission rod; 82. first connecting rod; 83. first rotating rod; 84. first transmission gear; 85. motor; 86. driving gear; 87. second rotating rod; 88. driven gear; 89. third rotating rod; 810. second transmission gear; 811. second connecting rod; 812. second transmission rod; 9. lower mounting plate; 91. lower roller; 10. upper mounting plate; 101. upper roller. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The following describes various embodiments of the present invention in detail in conjunction with the drawings.

[0035] See also Figures 1 to 4 The present invention preferably provides a technical solution: a mica cover plate with explosion-proof holes, comprising a first mica plate 1, a plurality of first explosion-proof holes 11 are arranged on the top of the first mica plate 1; a second mica plate 2, the bottom surface of the second mica plate 2 is fixed to the top surface of the first mica plate 1, and second explosion-proof holes 21 are arranged at positions of the second mica plate 2 corresponding to the first explosion-proof holes 11; a weakened line hole 12 connected to the first explosion-proof holes 11 is arranged at the bottom of the first mica plate 1.

[0036] In this embodiment, the first explosion relief hole 11 and the second explosion relief hole 21 together constitute the explosion relief hole of the mica cover plate product, and the weakened line hole 12 cooperates with the explosion relief hole to enable the internal high-pressure and high-temperature gas to be quickly released when the battery has thermal runaway, which can effectively prevent the high temperature from directly acting on the vehicle cab and the rear seat, thereby giving the occupants enough time to escape, meeting the needs of the ever-changing new energy electric vehicle market;

[0037] Specifically, the weakened line hole 12 is formed by inserting and weakening the first mica plate 1, and the size of each section is (1.65-2.0) mm×12 mm. The weakened line hole 12 formed by inserting and weakening belongs to the prior art and will not be described in detail here.

[0038] It is worth mentioning that the mica cover plate manufacturing process is simple, reliable, easy to operate and implement, and adopts the method of stacking hot pressing and machining by a hot press to effectively improve the quality of the mica cover plate, realize the assembly line operation of the mica cover plate, improve the manufacturing efficiency and product yield, and is suitable for mass production.

[0039] For further information, see Figures 3 to 6 The first explosion relief hole 11 is a blind hole, and the sum of the hole depth of the first explosion relief hole 11 and the hole depth of the second explosion relief hole 21 is equal to the thickness of the first mica board 1 .

[0040] In this embodiment, the first explosion relief hole 11 and the second explosion relief hole 21 are combined into the explosion relief hole of the mica cover plate. The limitation on the depth of the explosion relief hole ensures the strength and explosion relief effect of the mica cover plate.

[0041] Furthermore, positioning holes 3 are provided on the first mica board 1 and the second mica board 2, and the positioning holes 3 on the first mica board 1 correspond to the positioning holes 3 on the second mica board 2; a flame-retardant double-sided adhesive layer 4 is provided on the surface of the second mica board 2 away from the first mica board 1, and release paper is provided on the double-sided adhesive layer 4.

[0042] In this embodiment, the positioning hole 3 is provided to facilitate the subsequent positioning when the first mica board 1 and the second mica board 2 are stacked, ensuring that the first explosion relief hole 11 and the second explosion relief hole 21 in the mica cover product correspond to each other. In addition, the length and width dimensions reserve more than 10 mm of surplus material for subsequent processing. After tearing off the release paper, the mica cover product can be pasted on the battery box cover through the double-sided adhesive layer 4.

[0043] The present invention also discloses a method for manufacturing a mica cover plate with explosion venting holes, comprising the following steps:

[0044] S1. According to the shape, length and width of the mica cover plate product, a large sheet of mica paper raw material is cut into multiple small-sized mica papers according to the size requirements, and then the multiple mica papers are stacked up according to the thickness requirements of the mica cover plate product to form raw material A (raw material of the second mica plate 2) and raw material B (raw material of the first mica plate 1);

[0045] S2, cold pressing the raw material A and the raw material B through a hot press, and forming the A1 mica board and the B1 mica board with a plate-like structure after the cold pressing, wherein the thickness of the A1 mica board is greater than the thickness of the B1 mica board;

[0046] S3, machining the A1 mica board and the B1 mica board, and manufacturing the first explosion-relief hole 11 and the second explosion-relief hole 21 by machining according to the hole shape, size and position requirements of the mica cover plate product, the front projection shape and position requirements of the first explosion-relief hole 11 and the second explosion-relief hole 21 are the same as the blind hole front projection of the mica cover plate product, and after the machining is completed, the B2 mica board with the first explosion-relief hole 11 and the A2 mica board with the second explosion-relief hole 21 are formed;

[0047] S4, stacking a single A2 mica board and a single B2 mica board together according to the size requirements of the mica cover board product, putting them into a hot press, and hot pressing the A2 mica board and the B2 mica board into a whole, so as to obtain a C1 mica board with explosion venting holes;

[0048] S5. Machining the shape of the C1 mica board can obtain the required mica cover product with explosion-proof holes.

[0049] In this embodiment, the mica cover plate product produced by this mica plate production process has a simple structure, good fire resistance, heat resistance, flame retardancy and electrical insulation, as well as light weight and easy processing, which can effectively improve the quality of the mica cover plate. Through the design of the explosion venting holes on the mica cover plate, the internal high-pressure and high-temperature gas can be quickly released when the battery has thermal runaway, which has a good protective effect and meets the needs of the ever-changing new energy electric vehicle market.

[0050] Furthermore, in step S2 and step S4, the hot pressing temperature of the hot pressing machine is 100° C.-300° C., the pressure is 0-40 MPa, and the hot pressing time is 0.1 h-20 h.

[0051] Furthermore, in step S3 and step S5, the method of machining the A2 mica board to produce the second explosion relief hole 21 or the method of machining the shape of the C1 mica board includes stamping, laser cutting and milling machine engraving.

[0052] In this embodiment, the shape processing method of the C1 mica plate is not limited to the above method, and can also be achieved by non-machining methods such as chemical etching.

[0053] For further information, see Figures 8 to 11In step S4, the hot press machine includes: a hot press workbench 5, a first vertical plate 51 and a second vertical plate 52 parallel to the first vertical plate 51 are fixed at the bottom of the hot press workbench 5; a hot press assembly 6, the hot press assembly 6 is arranged above the hot press workbench 5 and performs hot press molding on the stacked A2 mica board and B2 mica board; a clamping mechanism, the clamping mechanism includes two groups of clamping assemblies 7 symmetrically distributed on both sides of the hot press assembly 6, the two groups of clamping assemblies 7 cooperate and are used to clamp and position the stacked A2 mica board and B2 mica board; the clamping assembly 7 includes: a clamping plate 71; a first sliding block 72, the top of the first sliding block 72 is connected to the bottom of the clamping plate 71 near the edge of one side of the clamping plate 71 The position is fixed, and a first slide groove 53 for sliding cooperation of the first sliding block 72 is provided on the hot pressing workbench 5; the second sliding block 73, the top of the second sliding block 73 and the bottom of the clamping plate 71 are fixed near the other side edge of the clamping plate 71, and a second slide groove 54 for sliding cooperation of the second sliding block 73 is provided on the hot pressing workbench 5; the transmission plate 74, the top of the transmission plate 74 is fixed to the bottom of the first sliding block 72, and the transmission plate 74 is vertically arranged with the clamping plate 71; the limit block 75, the top of the limit block 75 is fixed to the bottom of the second sliding block 73; the hot pressing machine also includes: a driving assembly 8, the driving assembly 8 is used to drive the transmission plates 74 on both sides to move closer to or away from each other.

[0054] In this embodiment, after the driving component 8 is working, it can make the transmission plates 74 on both sides approach or move away from each other. During this process, the first sliding block 72 and the second sliding block 73 move synchronously with the transmission plate 74, so that the two clamping plates 71 on both sides are close to or away from each other, so that the staff can clamp and fix the stacked first mica board 1 and the second mica board 2, which is convenient for the subsequent hot pressing molding of the first mica board 1 and the second mica board 2.

[0055] Furthermore, arc-shaped grooves 741 are provided on the transmission plates 74 on both sides; the driving assembly 8 includes: a first transmission rod 81, the first transmission rod 81 is slidably matched with the arc-shaped groove 741 on one side of the transmission plate 74; a first connecting rod 82, one end of the first connecting rod 82 is fixed to the first transmission rod 81; a first rotating rod 83, the first rotating rod 83 is rotatably installed on the first vertical plate 51; a first transmission gear 84, the first transmission gear 84 is fixedly sleeved on the first rotating rod 83, and the first transmission gear 84 is located between the first connecting rod 82 and the first vertical plate 51; a motor 85, the motor 85 is fixed on the first vertical plate 51, and the output end of the motor 85 passes through the first vertical plate 51 and is rotatably connected; a driving gear 86, the driving gear 86 is fixed to the output end of the motor 85 and meshes with the first transmission gear 84; a second rotating rod 87, the second rotating rod 87 is rotatably installed on the first vertical plate 51, and the first connecting rod 82 is fixed to the end of the second rotating rod 87 on the side away from the first transmission rod 81; the driven gear 88, the driven gear 88 is fixedly sleeved on the second rotating rod 87 and meshed with the driving gear 86; the third rotating rod 89, the third rotating rod 89 is rotatably installed on the first vertical plate 51; the second transmission gear 810, the second transmission gear 810 is fixedly sleeved on the third rotating rod 89 and meshed with the driven gear 88; the second connecting rod 811, one end of the second connecting rod 811 is fixed to the end of the third rotating rod 89, and the second connecting rod 811 is located on the side of the second transmission gear 810 away from the first vertical plate 51; the second transmission rod 812, the second transmission rod 812 is fixed to one end of the second connecting rod 811 away from the third rotating rod 89, the second transmission rod 812 is located on the side of the second connecting rod 811 away from the first vertical plate 51, and the second transmission rod 812 is slidably matched with the arc-shaped groove 741 on the side away from the first connecting rod 82.

[0056] In this embodiment, after the motor 85 works, it drives the driving gear 86 to rotate, and the driving gear 86 drives the first transmission gear 84 and the driven gear 88 meshing therewith to rotate (and the direction of the first transmission gear 84 and the driven gear 88 are opposite to the direction of the driving gear 86), the first transmission gear 84 drives the first connecting rod 82 to rotate through the first rotating rod 83, the first transmission rod 81 on the first connecting rod 82 slides in one of the arc-shaped grooves 741, and the driven gear 88 drives the third rotating rod 89 to rotate through the second transmission gear 810, so that the third rotating rod 89 drives the second connecting rod 811 to rotate, and the second transmission rod 812 on the second connecting rod 811 slides in another arc-shaped groove 741, so that the clamping plates 71 on both sides are close to or away from each other, so as to clamp and fix the stacked first mica board 1 and the second mica board 2.

[0057] For further information, see Fig. 9 and Fig.11The top of the transmission plate 74 is detachably connected to a lower mounting plate 9, and a lower roller shaft 91 is commonly provided at the bottom of the lower mounting plate 9 and the top of the transmission plate 74. The lower roller shaft 91 is movably connected to the top of the transmission plate 74 and the bottom of the lower mounting plate 9, and the axis of the lower roller shaft 91 is located on the intersection surface between the top of the transmission plate 74 and the bottom of the lower mounting plate 9, and the top of the lower roller shaft 91 is in rolling cooperation with the bottom of the hot pressing workbench 5; the bottom of the clamping plate 71 is detachably connected to an upper mounting plate 10, and the top of the upper mounting plate 10 and the bottom of the clamping plate 71 are commonly provided with an upper roller shaft 101, and the upper roller shaft 101 is movably connected to the bottom of the clamping plate 71 and the top of the upper mounting plate 10, and the axis of the upper roller shaft 101 is located on the intersection surface between the bottom of the clamping plate 71 and the top of the upper mounting plate 10, and the upper roller shaft 101 is in rolling cooperation with the top of the hot pressing workbench 5.

[0058] In this embodiment, the setting of the upper roller 101 reduces the friction between the bottom of the clamping plate 71 and the top of the hot pressing workbench 5, and the setting of the lower roller 91 reduces the friction between the bottom of the hot pressing workbench 5 and the top of the transmission plate 74, which is beneficial to extending the service life of the equipment.

[0059] For further information, see Figure 8 and Fig. 9 The hot pressing assembly 6 includes a cylinder 61 arranged above the hot pressing workbench 5 and a hot pressing plate 62 fixed to the lower end of the piston rod of the cylinder 61 (the fixing frame of the cylinder 61 is not shown in the figure, and the hot pressing plate 62 belongs to the existing technology and does not need to be elaborated here).

[0060] In this embodiment, after the cylinder 61 is operated, it drives the hot pressing plate 62 to move downward, so that the hot pressing plate 62 cooperates with the hot pressing workbench 5 and performs hot pressing forming operations on the stacked first mica board 1 and the second mica board 2.

[0061] In the present invention, unless otherwise clearly specified and limited, terms such as "install", "connect", "connect", and "fix" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. There are many ways of detachable installation, for example, it can be through the method of plug-in and snap-fit, or through the method of bolt connection, etc.

[0062] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above invention, which fall within the scope of protection of the present invention.

Claims

1. A mica cover plate with explosion venting holes, characterized in that: include: A first mica board (1), wherein a plurality of first explosion-relief holes (11) are arranged on the top of the first mica board (1); A second mica board (2), wherein the bottom surface of the second mica board (2) is fixed to the top surface of the first mica board (1), and second explosion-relief holes (21) are arranged at positions of the second mica board (2) corresponding to the first explosion-relief holes (11); A weakened line hole (12) communicating with the first explosion relief hole (11) is provided at the bottom of the first mica plate (1).

2. The mica cover plate with explosion venting holes according to claim 1, characterized in that: The first explosion relief hole (11) is a blind hole, and the sum of the hole depth of the first explosion relief hole (11) and the hole depth of the second explosion relief hole (21) is equal to the thickness of the first mica board (1).

3. The mica cover plate with explosion venting holes according to claim 1, characterized in that: The first mica board (1) and the second mica board (2) are both provided with positioning holes (3), and the positioning holes (3) on the first mica board (1) correspond in position to the positioning holes (3) on the second mica board (2); A flame-retardant double-sided adhesive layer (4) is provided on the surface of the second mica board (2) away from the first mica board (1), and a release paper is provided on the double-sided adhesive layer (4).

4. A method for manufacturing a mica cover plate with explosion venting holes according to any one of claims 1 to 3, characterized in that: The steps include: S1. According to the shape, length and width of the mica cover plate product, a large sheet of mica paper raw material is cut into multiple small-sized mica papers according to the size requirements, and then the multiple mica papers are stacked up according to the thickness requirements of the mica cover plate product to form raw material A and raw material B; S2, cold pressing the raw material A and the raw material B through a hot press to form a plate-like structure of mica board A1 and mica board B1, wherein the thickness of the mica board A1 is greater than the thickness of the mica board B1; S3, machining the A1 mica board and the B1 mica board, and manufacturing the first explosion-relief hole (11) and the second explosion-relief hole (21) through machining according to the hole shape, size and position requirements of the mica cover plate product, wherein the front projection shape and position requirements of the first explosion-relief hole (11) and the second explosion-relief hole (21) are the same as the front projection of the blind hole of the mica cover plate product, and after machining is completed, a B2 mica board with the first explosion-relief hole (11) and an A2 mica board with the second explosion-relief hole (21) are formed; S4, stacking the single A2 mica board and the single B2 mica board together according to the size requirements of the mica cover board product, putting them into a hot press, and hot pressing the A2 mica board and the B2 mica board into a whole, so as to obtain a C1 mica board with explosion venting holes; S5. Machining the shape of the C1 mica board to obtain the desired mica cover board product with explosion venting holes.

5. The method for manufacturing a mica cover plate with explosion venting holes according to claim 4, characterized in that: In step S2 and step S4, the hot pressing temperature of the hot pressing machine is 100° C.-300° C., the pressure is 0-40 MPa, and the hot pressing time is 0.1 h-20 h.

6. The method for manufacturing a mica cover plate with explosion venting holes according to claim 5, characterized in that: In step S3 and step S5, the method of machining the A2 mica board to produce the second explosion relief hole (21) or the method of machining the shape of the C1 mica board includes punching, laser cutting and milling machine engraving.

7. The method for manufacturing a mica cover plate with explosion venting holes according to claim 5, characterized in that: In step S4, the hot press comprises: A hot pressing workbench (5), wherein a first vertical plate (51) and a second vertical plate (52) parallel to the first vertical plate (51) are fixed at the bottom of the hot pressing workbench (5); A hot pressing assembly (6), wherein the hot pressing assembly (6) is arranged above the hot pressing workbench (5) and performs hot pressing molding on the stacked A2 mica board and the B2 mica board; A clamping mechanism, the clamping mechanism comprising two groups of clamping assemblies (7) symmetrically distributed on both sides of the hot pressing assembly (6), the two groups of clamping assemblies (7) cooperate and are used to clamp and position the stacked A2 mica board and the B2 mica board; The clamping assembly (7) comprises: Clamping plate (71); a first sliding block (72), the top of the first sliding block (72) being fixed to the bottom of the clamping plate (71) near the edge of one side of the clamping plate (71), and a first sliding groove (53) for sliding cooperation of the first sliding block (72) being provided through the hot pressing workbench (5); a second sliding block (73), the top of the second sliding block (73) being fixed to the bottom of the clamping plate (71) near the other side edge of the clamping plate (71), and a second sliding groove (54) for sliding cooperation of the second sliding block (73) being provided through the hot pressing workbench (5); A transmission plate (74), the top of the transmission plate (74) is fixed to the bottom of the first sliding block (72), and the transmission plate (74) and the clamping plate (71) are arranged vertically; A limit block (75), the top of the limit block (75) being fixed to the bottom of the second sliding block (73); The hot press also includes: A driving assembly (8), wherein the driving assembly (8) is used to drive the transmission plates (74) on both sides to move closer to or farther from each other.

8. The method for manufacturing a mica cover plate with explosion venting holes according to claim 7, characterized in that: The transmission plates (74) on both sides are provided with arc-shaped grooves (741); The driving assembly (8) comprises: A first transmission rod (81), the first transmission rod (81) being slidably matched with a circular arc groove (741) on one side of the transmission plate (74); A first connecting rod (82), one end of the first connecting rod (82) being fixed to the first transmission rod (81); A first rotating rod (83), the first rotating rod (83) being rotatably mounted on the first vertical plate (51); A first transmission gear (84), the first transmission gear (84) is fixedly sleeved on the first rotating rod (83), and the first transmission gear (84) is located between the first connecting rod (82) and the first vertical plate (51); A motor (85), wherein the motor (85) is fixed to the first vertical plate (51), and an output end of the motor (85) passes through the first vertical plate (51) and is rotationally connected thereto; A driving gear (86), the driving gear (86) being fixed to the output end of the motor (85) and meshing with the first transmission gear (84); a second rotating rod (87), the second rotating rod (87) being rotatably mounted on the first vertical plate (51), and a side of the first connecting rod (82) away from the first transmission rod (81) being fixed to an end of the second rotating rod (87); A driven gear (88), wherein the driven gear (88) is fixedly sleeved on the second rotating rod (87) and meshes with the driving gear (86); a third rotating rod (89), the third rotating rod (89) being rotatably mounted on the first vertical plate (51); a second transmission gear (810), the second transmission gear (810) being fixedly sleeved on the third rotating rod (89) and meshing with the driven gear (88); a second connecting rod (811), one end of the second connecting rod (811) being fixed to the end of the third rotating rod (89), and the second connecting rod (811) being located on a side of the second transmission gear (810) away from the first vertical plate (51); A second transmission rod (812), the second transmission rod (812) is fixed to one end of the second connecting rod (811) away from the third rotating rod (89), the second transmission rod (812) is located on a side of the second connecting rod (811) away from the first vertical plate (51), and the second transmission rod (812) is slidably engaged with the arc-shaped groove (741) on a side away from the first connecting rod (82).

9. The method for manufacturing a mica cover plate with explosion venting holes according to claim 8, characterized in that: The top of the transmission plate (74) is detachably connected to a lower mounting plate (9); the bottom of the lower mounting plate (9) and the top of the transmission plate (74) are jointly provided with a lower roller shaft (91); the lower roller shaft (91) is movably connected to the top of the transmission plate (74) and the bottom of the lower mounting plate (9); the axis of the lower roller shaft (91) is located on the intersection surface between the top of the transmission plate (74) and the bottom of the lower mounting plate (9); and the top of the lower roller shaft (91) is in rolling cooperation with the bottom of the hot pressing workbench (5); The bottom of the clamping plate (71) is detachably connected to an upper mounting plate (10); the top of the upper mounting plate (10) and the bottom of the clamping plate (71) are jointly provided with an upper roller shaft (101); the upper roller shaft (101) is movably connected to the bottom of the clamping plate (71) and the top of the upper mounting plate (10); the axis of the upper roller shaft (101) is located on the intersection surface between the bottom of the clamping plate (71) and the top of the upper mounting plate (10), and the upper roller shaft (101) is in rolling cooperation with the top of the hot pressing workbench (5).

10. The method for manufacturing a mica cover plate with explosion venting holes according to claim 7, characterized in that: The hot pressing assembly (6) comprises a cylinder (61) arranged above the hot pressing workbench (5) and a hot pressing plate (62) fixed to the lower end of the piston rod of the cylinder (61).

Images