Explosion point testing device for battery explosion-proof sheet and use method of explosion point testing device

Abstract

The invention discloses a battery explosion-proof sheet explosion point testing device and a use method thereof, and relates to the technical field of battery explosion-proof sheet detection, and the battery explosion-proof sheet explosion point testing device comprises an upper clamping plate and a lower clamping plate; a placing groove matched with the anti-explosion sheet is formed in the lower clamping plate; a positioning mechanism is arranged between the upper clamping plate and the lower clamping plate; the positioning mechanism comprises a positioning ring which is arranged in the placing groove; the positioning ring is of an annular structure matched with the outer side edge of the anti-explosion piece, and the cross section of the annular structure is of a conical structure with the tip facing upwards. A clamping ring; and a driving member. By arranging the positioning mechanism, when the anti-explosion piece is clamped, the positioning ring applies pressure to the part, away from the nick, of the outer edge of the anti-explosion piece to promote the anti-explosion piece to deform, and the positioning ring is effectively matched with the clamping ring, so that rigid clamping of the anti-explosion piece is achieved, the good sealing effect is guaranteed, and the anti-explosion piece is prevented from being damaged. Meanwhile, the situation that in the subsequent pressure testing process, the clamped part deforms in advance, and consequently the capacity of the explosion-proof piece for normal unfolding and deformation along the nick is interfered is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery explosion-proof piece detection, and in particular to a battery explosion-proof piece explosion point testing device and a use method thereof. Background Art

[0002] The battery explosion-proof disc is a key component to ensure battery safety. It is designed to open automatically when the internal pressure rises abnormally to prevent explosions caused by overpressure. To ensure smooth rupture at a predetermined pressure, the surface of the explosion-proof disc is provided with fine notches to reduce the material strength in this area, making it the weakest point. In this way, when the internal pressure reaches a certain level, the explosion-proof disc will rupture first at the notch, effectively releasing the pressure and ensuring battery safety.

[0003] In the prior art, the explosion point value of the explosion-proof plate directly affects the safety of the battery, so it is necessary to accurately measure its explosion point pressure through a special testing device; during the test, a clamping tool is used to accurately fix the explosion-proof plate, and a sealing gasket is placed between the clamp block and the explosion-proof plate to ensure that the air pressure does not leak from the clamping position.

[0004] However, the above-mentioned battery explosion-proof plate explosion point test device still has the following defects during use:

[0005] (1) In the explosion point test of the battery explosion-proof disk, as the internal pressure increases, the sealing effect of the sealing gasket faces challenges; to ensure the sealing performance during pressurization, it is usually necessary to increase the clamping pressure; this may cause unnecessary deformation of the explosion-proof disk at the clamping point, especially at the pre-set notch position, interfering with its normal rupture behavior, thereby affecting the accuracy and reliability of the test results;

[0006] (2) Existing explosion point testing devices for battery explosion-proof plates can generally only measure the explosion point value, but cannot identify the specific location of the first rupture. If the first rupture is not at the designed intersection of the notches, but occurs at other locations, it may lead to an unexpected rupture path, making the rupture shape irregular or deviating from the designed position. This not only affects the efficiency of rapid gas release, but may also cause unexpected damage to surrounding components and may cause delayed opening of the explosion-proof plate, further increasing internal pressure and increasing safety risks. Summary of the invention

[0007] In order to overcome the above technical problems, the purpose of the present invention is to provide a battery explosion-proof disk explosion point test device and a method of using the same, so as to solve the problem that the clamping structure of the existing battery explosion-proof disk explosion point test device is easy to interfere with the normal rupture behavior of the explosion-proof disk during testing and use, thereby affecting the accuracy and reliability of the test results.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A battery explosion-proof plate explosion point test device comprises an upper clamping plate and a lower clamping plate; the lower clamping plate is provided with a placement groove adapted to the explosion-proof plate; a positioning mechanism is arranged between the upper clamping plate and the lower clamping plate; the positioning mechanism comprises:

[0010] A positioning ring, the positioning ring is arranged in the placement groove; the positioning ring is an annular structure adapted to the outer side of the explosion-proof disk, and the cross section of the annular structure is a conical structure with the tip facing upward;

[0011] A clamping ring, which is arranged on the upper clamping plate and is used to cooperate with the positioning ring to clamp the outer edge of the explosion-proof disk;

[0012] and a driving member installed between the upper clamping plate and the lower clamping plate.

[0013] Preferably, the positioning mechanism further comprises an auxiliary positioning mechanism; the auxiliary positioning mechanism comprises a mounting block, a positioning plate, a first spring, a push block and a wedge block; the mounting block is arranged on the lower clamping plate, the positioning plate is provided with a connecting shaft, and the positioning plate is slidably connected to the mounting block via the connecting shaft; the first spring is sleeved on the connecting shaft between the mounting block and the positioning plate, and is used to push the positioning plate to contact the side wall of the explosion-proof disk;

[0014] The push block is slidably connected to the mounting block; the push block is connected to the connecting shaft and is used to drive the positioning plate to move and separate from the explosion-proof disk;

[0015] The positioning plate is provided with a wedge-shaped groove, and the upper clamping plate is fixed with a wedge-shaped block adapted to the wedge-shaped groove; when the upper clamping plate and the lower clamping plate are close to each other and collide with each other, the wedge-shaped block pushes the positioning plate to move through the wedge-shaped groove, so that the positioning plate is separated from the explosion-proof plate.

[0016] Preferably, the explosion point test device of the battery explosion-proof plate further comprises a pressure test mechanism; the pressure test mechanism comprises an air pump and a pressure control mechanism; an air inlet hole connected to the placement groove is provided on the lower clamping plate, and a first air outlet hole is provided on the upper clamping plate; when the upper clamping plate and the lower clamping plate are close to each other, the air inlet hole is connected to the first air outlet hole through the placement groove; the output end of the air pump is connected to the air inlet hole and is used to pass high-pressure gas into the air inlet hole; the pressure control mechanism is used to control the pressure of the air pressure in the air inlet hole;

[0017] An air pressure sensor is installed in the air inlet and is used to detect the air pressure in the air inlet.

[0018] Preferably, the pressure control mechanism includes a sealing mechanism; an air guide hole connected to the air inlet hole is provided on the lower clamp plate, and a second air outlet hole connected to the air guide hole is provided on the lower clamp plate; the air guide hole can be connected to the outside through the second air outlet hole; the sealing mechanism is arranged at a position between the air guide hole and the second air outlet hole, and is used to seal the air guide hole when the explosion point pressure of the explosion-proof plate is detected.

[0019] Preferably, the sealing mechanism includes a mounting disc, a rotating disc and a first driving mechanism; the mounting disc is coaxially mounted in the air guide hole, and the rotating disc is coaxially rotatably connected to the mounting disc; matching through holes are provided on both the mounting disc and the rotating disc; the first driving mechanism is mounted on the lower clamping plate; the output end of the first driving mechanism is connected to the rotating disc, and is used to drive the rotating disc to rotate, so that the through hole on the rotating disc is aligned with or completely offset from the through hole on the mounting disc; when the through hole is aligned with the through hole on the mounting disc, the air guide hole is connected to the second air outlet through the through hole.

[0020] Preferably, the first driving mechanism includes a spiral bevel gear ring, a spiral bevel gear and a motor; the spiral bevel gear ring is coaxially connected to the rotating disk, the spiral bevel gear is rotatably connected in the air guide hole, and the spiral bevel gear is meshingly connected to the spiral bevel gear ring; the output end of the motor is coaxially connected to the spiral bevel gear.

[0021] Preferably, the pressure control mechanism also includes a pressure regulating mechanism; the pressure regulating mechanism is used to generate negative pressure in the air guide hole between the sealing mechanism and the second air outlet, so that when the air guide hole is connected to the second air outlet, the generated negative pressure is used to offset the positive pressure in the air inlet.

[0022] Preferably, the pressure regulating mechanism includes a one-way valve and a second driving mechanism; the one-way valve is installed at the second air outlet, and when positive pressure is generated in the air guide hole, the one-way valve can be pushed to open; the second driving mechanism is installed at the lower clamping plate; the output end of the second driving mechanism is plugged into the air guide hole, and is used to generate negative pressure in the air guide hole.

[0023] Preferably, the second driving mechanism includes a piston, a cylinder and a second spring; the piston is coaxially slidably connected to the air guide hole, the cylinder is installed on the lower clamping plate, the output end of the cylinder is connected to the piston through the second spring, and the axis of the output shaft of the cylinder coincides with the axis of the air guide hole.

[0024] A method for using a battery explosion-proof plate explosion point testing device comprises the following steps:

[0025] Step 1: Positioning and clamping: Place the explosion-proof disk on the positioning ring in the placement groove, and then drive the upper clamping plate and the lower clamping plate to approach each other through the driving member until the explosion-proof disk is clamped by the positioning ring and the clamping ring. At this time, continue to drive the upper clamping plate and the lower clamping plate to approach each other, so that the positioning ring squeezes the outer peripheral side of the explosion-proof disk, causing it to deform to a certain extent, forming a rigid clamping and positioning;

[0026] Step 2: Explosion point test: After positioning and clamping, perform pressure test on the explosion-proof plate until the explosion-proof plate is damaged by pressure. At this time, the explosion point pressure value can be obtained through the change in air pressure borne by the explosion-proof plate.

[0027] Beneficial effects of the present invention:

[0028] 1. By setting a positioning mechanism, when clamping the explosion-proof disk, the positioning ring applies pressure to the portion of the explosion-proof disk that is away from the notch on the outer edge to cause it to deform, and effectively cooperates with the clamping ring to achieve rigid clamping of the explosion-proof disk, which not only ensures a good sealing effect, but also avoids the deformation of the clamping part in advance during the subsequent pressure test, thereby interfering with the ability of the explosion-proof disk to normally expand and deform along the notch;

[0029] 2. By setting up an auxiliary positioning mechanism, the explosion-proof disk can be stably clamped. When the positioning ring and the clamping ring squeeze and deform the explosion-proof disk, the positioning plate can be automatically separated from the explosion-proof disk in advance to ensure that the explosion-proof disk is clamped in an unchanged state throughout the process. At the same time, it is ensured that when the positioning ring and the clamping ring squeeze and deform the explosion-proof disk, they will not be affected by the positioning plate, so that they can deform correctly according to the design intention, thereby ensuring the accuracy and reliability of the explosion point test of the explosion-proof disk;

[0030] 3. By setting up a pressure control mechanism and pumping air from the air inlet, the internal positive pressure can be quickly offset. This step is intended to reduce the impact force at the explosion position of the explosion-proof disk and ensure that the explosion-proof disk stops deforming immediately at the moment of breaking. This method not only accurately measures the explosion point value of the explosion-proof disk, but also provides important information about its breaking behavior, thereby testing the explosion-proof disk's breaking trajectory and helping to ensure the safety and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0033] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the lower clamping plate of the present invention;

[0034] Figure 3 The present invention Figure 2 A three-dimensional enlarged structural diagram after removing the explosion-proof disk;

[0035] Figure 4 It is a schematic diagram of a partially cutaway three-dimensional enlarged structure of the present invention;

[0036] Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure of the middle A area;

[0037] Figure 6 The present invention Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0038] Figure 7 It is a partial main view cutaway enlarged structural schematic diagram of the present invention;

[0039] Figure 8 The present invention Figure 7 Schematic diagram of the enlarged structure of the middle C area;

[0040] Fig. 9 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the lower splint of the present invention;

[0041] Fig.10 The present invention Fig. 9 Schematic diagram of the enlarged structure of the middle D area;

[0042] Fig.11 It is a three-dimensional exploded schematic diagram of the partial structure of the sealing mechanism of the present invention;

[0043] Fig.12 It is a flow chart of the method of the present invention.

[0044] In the figure: 1, upper clamping plate; 2, lower clamping plate; 3, positioning mechanism; 31, placement groove; 32, positioning ring; 33, clamping ring; 34, driving member; 35, auxiliary positioning mechanism; 351, mounting block; 352, positioning plate; 353, first spring; 354, push block; 355, wedge groove; 356, wedge block; 4, pressure testing mechanism; 41, air inlet; 42, first air outlet; 43, pressure control mechanism; 431. air guide hole; 432. sealing mechanism; 4321. mounting disc; 4322. rotating disc; 4323. through hole; 4324. first driving mechanism; 43241. spiral bevel gear ring; 43242. spiral bevel gear; 43243. motor; 433. second air outlet; 434. pressure regulating mechanism; 4341. one-way valve; 4342. piston; 4343. cylinder; 4344. second spring. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figures 1 to 11 As shown, a battery explosion-proof plate explosion point testing device, such as Figures 1 to 5 As shown, it includes an upper clamping plate 1 and a lower clamping plate 2; a placement groove 31 adapted to the explosion-proof plate is opened on the lower clamping plate 2; a positioning mechanism 3 and a pressure testing mechanism 4 for testing the explosion point pressure value of the explosion-proof plate are arranged between the upper clamping plate 1 and the lower clamping plate 2; the positioning mechanism 3 includes: a positioning ring 32, which is arranged in the placement groove 31; the positioning ring 32 is an annular structure adapted to the outer edge of the explosion-proof plate, and the cross-section of the annular structure is a conical structure with the tip facing upward; a clamping ring 33, which is arranged on the upper clamping plate 1 and is used to cooperate with the positioning ring 32 to clamp the outer edge of the explosion-proof plate; and a driving member 34, which is installed between the upper clamping plate 1 and the lower clamping plate 2; it can be understood that the driving member 34 is a prior art, such as a hydraulic cylinder, which is used to drive the upper clamping plate 1 and the lower clamping plate 2 to move closer or farther from each other up and down.

[0047] It should be noted that before conducting an explosion point test on a battery explosion-proof disc, it is necessary to ensure that the explosion-proof disc is accurately positioned and firmly clamped. The specific operation is as follows: first, place the explosion-proof disc on the positioning ring 32 in the placement groove 31, and then use the driving member 34 to gradually bring the upper clamping plate 1 and the lower clamping plate 2 closer together until the clamping ring 33 and the positioning ring 32 work together to completely fix the explosion-proof disc. Continue to apply pressure through the driving member 34 to bring the upper clamping plate 1 and the lower clamping plate 2 closer together. At this time, the positioning ring 32 will apply pressure to the portion of the explosion-proof disc whose outer edge is away from the notch to cause it to deform, but this process will not affect the area close to the notch;

[0048] Through the effective cooperation of the positioning ring 32 and the clamping ring 33, the rigid clamping of the bursting disc is achieved, which not only ensures a good sealing effect, but also prevents the clamping part from deforming prematurely during the subsequent pressure test, thereby preventing the bursting disc from being disturbed by the normal expansion and deformation along the notch. This design ensures that the bursting point of the bursting disc can be accurately evaluated when it is tested by the pressure testing mechanism 4, thereby ensuring the reliability of the test results.

[0049] like Figures 1 to 6As shown, the positioning mechanism 3 also includes an auxiliary positioning mechanism 35; the auxiliary positioning mechanism 35 includes a mounting block 351, a positioning plate 352, a first spring 353, a push block 354 and a wedge block 356; the mounting block 351 is arranged on the lower clamping plate 2, and a connecting shaft is arranged on the positioning plate 352, and the positioning plate 352 is slidably connected to the mounting block 351 through the connecting shaft; the first spring 353 is sleeved on the connecting shaft between the mounting block 351 and the positioning plate 352, and is used to push the positioning plate 352 and The side wall of the explosion-proof plate is in conflict; the push block 354 is slidably connected to the mounting block 351; the push block 354 is connected to the connecting shaft and is used to drive the positioning plate 352 to move and separate from the explosion-proof plate; a wedge-shaped groove 355 is provided on the positioning plate 352, and a wedge-shaped block 356 adapted to the wedge-shaped groove 355 is fixed on the upper clamping plate 1; when the upper clamping plate 1 and the lower clamping plate 2 are close to each other and in conflict, the wedge-shaped block 356 pushes the positioning plate 352 to move through the wedge-shaped groove 355, so that the positioning plate 352 is separated from the explosion-proof plate.

[0050] In order to ensure the accurate contact position between the explosion-proof disc and the positioning ring 32, and to prevent the deviation during the clamping process from adversely affecting the notch position of the explosion-proof disc, an auxiliary positioning mechanism 35 is set up before positioning and clamping the explosion-proof disc to ensure its accurate positioning. The specific operation process is as follows: First, push the explosion-proof disc into the placement groove 31. The positioning plate 352 is chamfered on the side close to the placement groove 31. As the explosion-proof disc moves, the chamfer will cause the positioning plate 352 to move away from the placement groove 31 and compress the first spring 353; when the explosion-proof disc is completely placed in the placement groove 31, the positioning plate 352 exerts a certain thrust on the side wall of the explosion-proof disc under the elastic force of the first spring 353, ensuring that the explosion-proof disc can be accurately positioned and clamped;

[0051] Next, the upper clamping plate 1 and the lower clamping plate 2 are gradually brought closer by the driving member 34, and the wedge block 356 begins to approach the wedge groove 355; as the two approach each other, the wedge block 356 uses the wedge groove 355 to push the positioning plate 352 away from the explosion-proof disk, so that the positioning plate 352 is separated from the explosion-proof disk. In this process, when the wedge block 356 just touches the inclined surface of the wedge groove 355, the clamping ring 33 also just touches the top of the explosion-proof disk; the wedge block 356 continues to move, and while the positioning plate 352 is further pushed away from the explosion-proof disk through the wedge groove 355, the clamping ring 33 gradually approaches the positioning ring 32, thereby achieving stable clamping of the upper and lower ends of the explosion-proof disk. During the whole process, the explosion-proof disk always remains in the correct positioning state, ensuring the stability and accuracy of clamping; in addition, the design of separating the positioning plate 352 from the explosion-proof disk in advance ensures that when the positioning ring 32 and the clamping ring 33 squeeze and deform the explosion-proof disk, they will not be affected by the positioning plate 352, so that they can deform correctly according to the design intention, thereby ensuring the accuracy and reliability of the explosion point test of the explosion-proof disk.

[0052] like Figures 1 to 4As shown, the pressure testing mechanism 4 includes an air pump and a pressure control mechanism 43; an air inlet 41 connected to the placement groove 31 is provided on the lower splint 2, and a first air outlet 42 is provided on the upper splint 1; when the upper splint 1 and the lower splint 2 are close to each other, the air inlet 41 is connected to the first air outlet 42 through the placement groove 31; the output end of the air pump is connected to the air inlet 41, and is used to introduce high-pressure gas into the air inlet 41; it can be understood that the air pump is a prior art, which is not drawn in the figure and will not be described in detail; the pressure control mechanism 43 is used to control the pressure of the air pressure in the air inlet 41; an air pressure sensor is installed in the air inlet 41, and is used to detect the air pressure in the air inlet 41; it can be understood that the air pressure sensor is a prior art, which is not drawn in the figure and will not be described in detail.

[0053] In order to test the explosion point value and fragmentation path of the explosion-proof disk, first, gas is introduced into the air inlet 41 through an air pump; due to the presence of the explosion-proof disk, the connection between the air inlet 41 and the first air outlet 42 is blocked, causing the air pressure in the air inlet 41 to gradually rise; as the air pressure continues to increase until it reaches the bearing limit of the explosion-proof disk, the explosion-proof disk will rupture along its notch, thereby forming a conductive path between the air inlet 41 and the first air outlet 42. At this time, the air pressure in the air inlet 41 will change significantly due to this sudden conduction. The air pressure sensor can monitor this air pressure change in real time and determine whether the explosion-proof disk has ruptured accordingly. The maximum pressure value recorded by the air pressure sensor is the explosion point value of the explosion-proof disk;

[0054] In order to further analyze the fragmentation path of the explosion-proof disc, at the moment when the air pressure sensor detects a sudden change in air pressure, the pressure control mechanism 43 is immediately activated to evacuate the air inlet 41 to quickly offset the internal positive pressure. This step is intended to reduce the impact force at the explosion position of the explosion-proof disc and ensure that the explosion-proof disc stops deforming immediately at the moment of fragmentation. By controlling the activation of the pressure control mechanism 43 at different time points, the deformation state of the explosion-proof disc can be captured at different stages of the explosion, and the complete fragmentation traces can be recorded. Only when the explosion-proof disc is broken along the notch as expected, it is considered a qualified product. This method not only accurately measures the explosion point value of the explosion-proof disc, but also provides important information about its fragmentation behavior, which helps to ensure the safety and reliability of the product.

[0055] like Figure 1 and Figures 7 and 8 As shown, the pressure control mechanism 43 includes a sealing mechanism 432; an air guide hole 431 connected to the air inlet hole 41 is provided on the lower clamp plate 2, and a second air outlet hole 433 connected to the air guide hole 431 is provided on the lower clamp plate 2; the air guide hole 431 can be connected to the outside through the second air outlet hole 433; the sealing mechanism 432 is arranged at a position between the air guide hole 431 and the second air outlet hole 433, and is used to block the air guide hole 431 when the explosion point pressure of the explosion-proof plate is detected.

[0056] When the explosion-proof disc breaks at the explosion point pressure, the sealing mechanism 432 is immediately opened to quickly connect the air inlet 41 with the air guide hole 431. In this way, the positive pressure in the air inlet 41 can be quickly released through the air guide hole 431 via the second air outlet 433, thereby effectively offsetting the high pressure in the air inlet 41. This process can timely prevent the explosion-proof disc from continuing to deform and break further, and keep it in an appropriate deformation state. Doing so not only facilitates accurate recording of whether the explosion-proof disc breaks along the notch as expected, but also ensures the reliability and consistency of the test results. In this way, the fragmentation behavior of the explosion-proof disc can be accurately captured, providing key data for evaluating its performance.

[0057] like Figures 7 to 11 As shown, the sealing mechanism 432 includes a mounting disc 4321, a rotating disc 4322 and a first driving mechanism 4324; the mounting disc 4321 is coaxially mounted in the air guide hole 431, and the rotating disc 4322 is coaxially rotatably connected to the mounting disc 4321; the mounting disc 4321 and the rotating disc 4322 are both provided with matching through holes 4323; the first driving mechanism 4324 is mounted on the lower clamping plate 2 (as shown in FIG. Figure 1 The output end of the first driving mechanism 4324 is connected to the rotating disk 4322 and is used to drive the rotating disk 4322 to rotate so that the through hole 4323 on the rotating disk 4322 is aligned with or completely staggered with the through hole 4323 on the mounting disk 4321; when the through hole 4323 is aligned with the through hole 4323 on the mounting disk 4321, the air guide hole 431 passes through the through hole 4323 and is connected to the second air outlet hole 433.

[0058] It should be noted that the rotating disk 4322 is driven to rotate by the first driving mechanism 4324, so that the through hole 4323 on the rotating disk 4322 is connected with the through hole 4323 on the mounting disk 4321, and then the air inlet 41 is connected with the second air outlet 433 through the air guide hole 431, thereby achieving the purpose of offsetting the positive pressure in the air inlet 41.

[0059] like Figures 7 to 11 As shown, it can be understood that the present application does not limit the specific structure and installation method of the first driving mechanism 4324, and only provides a feasible technical solution below; the first driving mechanism 4324 includes a spiral bevel gear ring 43241, a spiral bevel gear 43242 and a motor 43243; the spiral bevel gear ring 43241 is coaxially connected to the rotating disk 4322, the spiral bevel gear 43242 is rotatably connected in the air guide hole 431, and the spiral bevel gear 43242 is meshingly connected to the spiral bevel gear ring 43241; the output end of the motor 43243 is coaxially connected to the spiral bevel gear 43242.

[0060] It should be noted that the spiral bevel gear 43242 is driven to rotate by the motor 43243, and the spiral bevel gear 43242 drives the spiral bevel gear ring 43241 to rotate, and then drives the rotating disk 4322 to rotate, so that the through hole 4323 on the rotating disk 4322 and the through hole 4323 on the mounting disk 4321 are completely aligned or staggered, thereby achieving the purpose of opening or closing the air guide hole 431.

[0061] like Figures 7 to 10 As shown, the pressure control mechanism 43 also includes a pressure regulating mechanism 434; the pressure regulating mechanism 434 is used to generate a negative pressure in the air guide hole 431 between the sealing mechanism 432 and the second air outlet hole 433, so that when the air guide hole 431 is connected to the second air outlet hole 433, the negative pressure generated is used to offset the positive pressure in the air inlet hole 41.

[0062] It should be noted that in order to ensure that the positive pressure in the air inlet 41 can be quickly offset in a very short time, a negative pressure suction force can be pre-formed in the air guide hole 431, so that when the air guide hole 431 is connected to the air inlet 41, the positive pressure in the air inlet 41 can be instantly offset. In this way, the explosion-proof plate can maintain a certain deformation state at an appropriate time point, which is convenient for recording the state of the explosion-proof plate after it is broken.

[0063] like Figure 8 and Fig.10 As shown, the pressure regulating mechanism 434 includes a one-way valve 4341 and a second driving mechanism; the one-way valve 4341 is installed at the second air outlet 433, and when positive pressure is generated in the air guide hole 431, the one-way valve 4341 can be pushed to open; the second driving mechanism is installed at the lower clamping plate 2 (such as Figure 1 The output end of the second driving mechanism is plugged into the air guide hole 431 and is used to generate negative pressure in the air guide hole 431.

[0064] It should be noted that when the air hole 431 is in a blocked state, negative pressure is generated in the air hole 431 through the second driving mechanism. At this time, the one-way valve 4341 remains in a closed state, so that when the air hole 431 is connected to the air inlet hole 41, the positive pressure in the air inlet hole 41 can be quickly offset.

[0065] like Figures 7 to 10 As shown, it can be understood that the present application does not limit the specific structure and installation method of the second driving mechanism, and only a feasible technical solution is provided below; the second driving mechanism includes a piston 4342, a cylinder 4343 and a second spring 4344; the piston 4342 is coaxially slidably connected to the air guide hole 431, the cylinder 4343 is installed on the lower clamping plate 2, and the output end of the cylinder 4343 is connected to the piston 4342 through the second spring 4344, and the axis of the output shaft of the cylinder 4343 coincides with the axis of the air guide hole 431.

[0066] It should be noted that the second spring 4344 is driven to move by the cylinder 4343, and the piston 4342 is driven to move by the second spring 4344, so that a negative pressure is generated in the air guide hole 431 between the piston 4342 and the mounting disk 4321. As the air pump increases the positive pressure in the air inlet hole 41, the stretching elastic force of the second spring 4344 driven by the cylinder 4343 is increased, and then the negative pressure in the air guide hole 431 between the piston 4342 and the mounting disk 4321 is synchronously increased, so that when the air guide hole 431 is connected to the air inlet hole 41, the positive pressure in the air inlet hole 41 can be just offset, so that the normal pressure can be quickly restored, which is convenient for the explosion-proof plate to remain in a broken state and is conducive to recording the broken trajectory of the explosion-proof plate.

[0067] like Figure 1-12 As shown, a method for using a battery explosion-proof plate explosion point testing device comprises the following steps:

[0068] Step 1: Positioning and clamping: Place the explosion-proof disk on the positioning ring 32 in the placement groove 31, and then drive the upper clamping plate 1 and the lower clamping plate 2 to approach each other through the driving member 34, until the explosion-proof disk is clamped by the positioning ring 32 and the clamping ring 33, and then continue to drive the upper clamping plate 1 and the lower clamping plate 2 to approach each other, so that the positioning ring 32 squeezes the outer peripheral side of the explosion-proof disk, causing it to deform to a certain extent, forming a rigid clamping and positioning;

[0069] Step 2: Explosion point test: After positioning and clamping, perform pressure test on the explosion-proof plate until the explosion-proof plate is damaged by pressure. At this time, the explosion point pressure value can be obtained through the change in air pressure borne by the explosion-proof plate.

[0070] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A battery explosion-proof plate explosion point testing device, comprising an upper clamping plate (1) and a lower clamping plate (2); characterized in that: The lower clamping plate (2) is provided with a placement groove (31) adapted to the explosion-proof disk; a positioning mechanism (3) is provided between the upper clamping plate (1) and the lower clamping plate (2); the positioning mechanism (3) comprises: A positioning ring (32), the positioning ring (32) being arranged in the placement groove (31); the positioning ring (32) being an annular structure adapted to the outer side of the explosion-proof disk, and the cross section of the annular structure being a conical structure with the tip facing upward; A clamping ring (33), the clamping ring (33) being arranged on the upper clamping plate (1) and being used to cooperate with the positioning ring (32) to clamp the outer edge of the explosion-proof disk; and a driving member (34), wherein the driving member (34) is installed between the upper clamping plate (1) and the lower clamping plate (2).

2. A battery explosion-proof plate explosion point testing device according to claim 1, characterized in that: The positioning mechanism (3) further comprises an auxiliary positioning mechanism (35); the auxiliary positioning mechanism (35) comprises a mounting block (351), a positioning plate (352), a first spring (353), a push block (354) and a wedge block (356); the mounting block (351) is arranged on the lower clamping plate (2); a connecting shaft is arranged on the positioning plate (352); the positioning plate (352) is slidably connected to the mounting block (351) via the connecting shaft; the first spring (353) is sleeved on the connecting shaft between the mounting block (351) and the positioning plate (352), and is used to push the positioning plate (352) to contact the side wall of the explosion-proof disk; The push block (354) is slidably connected to the mounting block (351); the push block (354) is connected to the connecting shaft and is used to drive the positioning plate (352) to move and separate from the explosion-proof disk; The positioning plate (352) is provided with a wedge-shaped groove (355), and the upper clamping plate (1) is fixedly provided with a wedge-shaped block (356) adapted to the wedge-shaped groove (355); when the upper clamping plate (1) and the lower clamping plate (2) are in a process of approaching and contacting each other, the wedge-shaped block (356) pushes the positioning plate (352) to move through the wedge-shaped groove (355), so that the positioning plate (352) is separated from the explosion-proof plate.

3. A battery explosion-proof plate explosion point testing device according to claim 1, characterized in that: The battery explosion-proof plate explosion point test device also includes a pressure testing mechanism (4); the pressure testing mechanism (4) includes an air pump and a pressure control mechanism (43); the lower clamping plate (2) is provided with an air inlet (41) connected to the placement groove (31), and the upper clamping plate (1) is provided with a first air outlet (42); when the upper clamping plate (1) and the lower clamping plate (2) are close to each other, the air inlet (41) is connected to the first air outlet (42) through the placement groove (31); the output end of the air pump is connected to the air inlet (41) and is used to pass high-pressure gas into the air inlet (41); the pressure control mechanism (43) is used to control the pressure of the air pressure in the air inlet (41); An air pressure sensor is installed in the air inlet (41) and is used to detect the air pressure in the air inlet (41).

4. A battery explosion-proof plate explosion point testing device according to claim 3, characterized in that: The pressure control mechanism (43) comprises a sealing mechanism (432); an air guide hole (431) communicating with the air inlet hole (41) is provided on the lower clamping plate (2); a second air outlet hole (433) communicating with the air guide hole (431) is provided on the lower clamping plate (2); the air guide hole (431) can be communicated with the outside through the second air outlet hole (433); the sealing mechanism (432) is arranged at a position between the air guide hole (431) and the second air outlet hole (433), and is used to block the air guide hole (431) when the explosion point pressure of the explosion-proof plate is detected.

5. A battery explosion-proof plate explosion point testing device according to claim 4, characterized in that: The sealing mechanism (432) comprises a mounting disc (4321), a rotating disc (4322) and a first driving mechanism (4324); the mounting disc (4321) is coaxially mounted in the air guide hole (431), and the rotating disc (4322) is coaxially rotatably connected to the mounting disc (4321); the mounting disc (4321) and the rotating disc (4322) are both provided with matching through holes (4323); the first driving mechanism (4324) is mounted on the lower clamping plate (2 ); the output end of the first driving mechanism (4324) is connected to the rotating disk (4322) and is used to drive the rotating disk (4322) to rotate, so that the through hole (4323) on the rotating disk (4322) is aligned with or completely staggered with the through hole (4323) on the mounting disk (4321); when the through hole (4323) is aligned with the through hole (4323) on the mounting disk (4321), the air guide hole (431) passes through the through hole (4323) to communicate with the second air outlet hole (433).

6. A battery explosion-proof plate explosion point testing device according to claim 5, characterized in that: The first driving mechanism (4324) comprises a spiral bevel gear ring (43241), a spiral bevel gear (43242) and a motor (43243); the spiral bevel gear ring (43241) is coaxially connected to the rotating disk (4322), the spiral bevel gear (43242) is rotatably connected in the air guide hole (431), and the spiral bevel gear (43242) is meshingly connected to the spiral bevel gear ring (43241); the output end of the motor (43243) is coaxially connected to the spiral bevel gear (43242).

7. A battery explosion-proof plate explosion point testing device according to claim 4, characterized in that: The pressure control mechanism (43) further comprises a pressure regulating mechanism (434); the pressure regulating mechanism (434) is used to generate a negative pressure in the air guide hole (431) between the sealing mechanism (432) and the second air outlet hole (433), so that when the air guide hole (431) is connected to the second air outlet hole (433), the generated negative pressure is used to offset the positive pressure in the air inlet hole (41).

8. A battery explosion-proof plate explosion point testing device according to claim 7, characterized in that: The pressure regulating mechanism (434) comprises a one-way valve (4341) and a second driving mechanism; the one-way valve (4341) is installed on the second air outlet hole (433), and when a positive pressure is generated in the air guide hole (431), the one-way valve (4341) can be pushed to open; the second driving mechanism is installed on the lower clamping plate (2); the output end of the second driving mechanism is plugged into the air guide hole (431) and is used to generate a negative pressure in the air guide hole (431).

9. A battery explosion-proof plate explosion point testing device according to claim 8, characterized in that: The second driving mechanism comprises a piston (4342), a cylinder (4343) and a second spring (4344); the piston (4342) is coaxially slidably connected to the air guide hole (431), the cylinder (4343) is installed on the lower clamping plate (2), the output end of the cylinder (4343) is connected to the piston (4342) through the second spring (4344), and the axis of the output shaft of the cylinder (4343) coincides with the axis of the air guide hole (431).

10. A method for using a battery explosion-proof plate explosion point testing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, positioning and clamping: the explosion-proof disk is placed on the positioning ring (32) in the placement groove (31), and then the upper clamping plate (1) and the lower clamping plate (2) are driven to approach each other by the driving member (34) until the explosion-proof disk is clamped by the positioning ring (32) and the clamping ring (33). At this time, the upper clamping plate (1) and the lower clamping plate (2) are continued to be driven to approach each other, so that the positioning ring (32) squeezes the outer peripheral side of the explosion-proof disk, causing it to undergo a certain deformation, thereby forming a rigid clamping and positioning; Step 2: Explosion point test: After positioning and clamping, perform pressure test on the explosion-proof plate until the explosion-proof plate is damaged by pressure. At this time, the explosion point pressure value can be obtained through the change in air pressure borne by the explosion-proof plate.

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