New energy battery cover plate safety performance detection device and method

Abstract

The invention discloses a new energy battery cover plate safety performance detection device and method, and the device comprises a pedestal which is provided with a supporting frame. A first position adjusting mechanism is installed in the supporting frame, and an impact assembly is installed on the first position adjusting mechanism in a transmission mode. A folding and unfolding mechanism is installed on the base, a rubber film is wound in the folding and unfolding mechanism, a liftable sealing cover is installed above the supporting frame, a second position adjusting mechanism is installed in the sealing cover, a pressing and covering ring is installed on the second position adjusting mechanism in a transmission mode, and the impact assembly vertically and upwards impacts the battery cover plate under the pressing and covering ring. The outer wall of the sealing cover is fixedly provided with a first pressure intensity sensor and an air supply valve which are communicated with the interior of the sealing cover. According to the invention, the problem that the deformation condition of the battery cover plate after impact is difficult to accurately quantify in the existing new energy battery cover plate safety performance detection technology is solved.

Description

Technical Field

[0001] The present invention relates to the field of detection technologies, and particularly to a device and method for detecting the safety performance of a new energy battery cover plate. Background Art

[0002] With the booming development of the new energy industry, as a core component, the safety of new energy batteries is of crucial importance. As a key protective component of the battery, the battery cover plate needs to have good safety performance to withstand various impacts, pressure changes, etc. that may occur during the use of the battery.

[0003] In the existing safety performance detection technologies for new energy battery cover plates, there are many deficiencies in the detection means for the deformation of the battery cover plate. Traditional detection methods mostly rely on manual visual inspection or simple measuring tools. This qualitative detection method is difficult to accurately quantify the deformation of the battery cover plate after being impacted. For example, in some detections, only by observing whether obvious cracks or depressions appear on the surface of the battery cover plate to determine whether it is qualified, and for those tiny deformations that may affect the long-term use safety of the battery, they cannot be accurately detected. Even if some detections use relatively advanced equipment, such as a simple pressure test device, it only simply tests the pressure threshold that the battery cover plate can withstand, and cannot measure and analyze the deformation volume generated after the impact.

[0004] In actual use, even if the battery cover plate undergoes tiny deformation, it may lead to problems such as a decrease in the internal sealing performance of the battery and gas leakage, thereby affecting the performance and safety of the battery. Therefore, developing a detection device and method that can accurately measure the deformation of the battery cover plate after being impacted has become an urgent problem to be solved in the current new energy battery field. Summary of the Invention

[0005] In order to solve the problem that it is difficult to accurately quantify the deformation of the new energy battery cover plate after being impacted in the existing safety performance detection technologies for new energy battery cover plates, the purpose of the present invention is to provide a device and method for detecting the safety performance of a new energy battery cover plate.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A safety performance detection device for a new energy battery cover plate, comprising a base, on which a support frame is installed, and its top port is used to support the battery cover plate; a first position adjustment mechanism is installed in the support frame, and an impact component is drivingly installed on the first position adjustment mechanism; a retractable mechanism is installed on the base, and a rubber film is wound in the retractable mechanism for retracting and extending the rubber film at the port of the support frame; a liftable sealing cover is installed above the support frame for sealing and pressing the rubber film on the port of the battery cover; a second position adjustment mechanism is installed in the sealing cover, and a pressing ring is drivingly installed on the second position adjustment mechanism for pressing down the rubber film on the battery cover plate; the impact component vertically impacts the battery cover plate directly below the pressing ring, and a first pressure sensor and a gas supply valve communicated with its interior are respectively fixedly installed on the outer wall of the sealing cover.

[0007] Preferably, a support block is fixedly connected to the bottom of the support frame, and the bottom of the support block is fixedly connected to the top surface of the base.

[0008] Preferably, the first position adjustment mechanism includes a support plate fixedly installed on the top surface of the support block, a first motor is fixedly installed at the bottom of the support plate, the output end of the first motor is axially connected to a first mounting plate arranged above the support plate, a first hydraulic cylinder is fixedly installed on the first mounting plate, the first hydraulic cylinder is driven in the horizontal direction, and its telescopic end is fixedly connected to the impact component.

[0009] Preferably, the impact component includes a cavity fixedly connected to the telescopic end of the first hydraulic cylinder, a cylinder body is fixedly connected to the top surface of the cavity, a through hole is opened on the top surface of the cavity located inside the cylinder body, an impact head is slidably sleeved on the inner wall of the cylinder body, an annular groove is opened on the outer wall of the impact head near the bottom, and a strip-shaped groove is vertically opened on the outer wall above the annular groove; an annular plate that abuts against the bottom of the impact head is fixedly sleeved on the inner wall of the cylinder body, and a limiting block is fixedly connected to the inner wall near the top port; the outer wall of the limiting block is slidably connected to the inner wall of the strip-shaped groove, a first electric push rod is fixedly installed on the outer wall of the cylinder body, the telescopic end of the first electric push rod is fixedly connected to a movable block, and the movable block is slidably penetrated through the outer wall of the cylinder body, and the movable block can be pushed into the annular groove by the first electric push rod; a first electromagnetic valve communicated with its interior is fixedly installed on the outer wall of the cylinder body above the annular plate, a spring is arranged in the cylinder body, and both ends of the spring respectively abut against the bottom of the impact head and the top surface of the cavity, and the top of the impact head is hemispherical; a second pressure sensor communicated with its interior is fixedly installed on the outer wall of the cavity, and an air inlet valve communicated with its interior is fixedly installed on the outer wall of the cavity.

[0010] Preferably, the unfolding and retracting mechanism includes a first U-shaped frame fixedly installed on the base. A second motor is fixedly installed on the side wall of the first U-shaped frame. The output end of the second motor is axially connected to a first winding wheel disposed inside the first U-shaped frame. The unfolding and retracting mechanism further includes a linear motor fixedly installed on the base. The top of the driving table of the linear motor is fixedly installed with a second U-shaped frame. A third motor is fixedly installed on the side of the second U-shaped frame. The output end of the third motor is axially connected to a second winding wheel disposed inside the second U-shaped frame. Both ends of the rubber film are wound by the first winding wheel and the second winding wheel respectively. The bottom of the second U-shaped frame is set higher than the top port of the support frame. The first winding wheel and the second winding wheel are at the same height.

[0011] Preferably, a gantry is fixedly connected to the base. The linear motor is located inside the gantry. A second hydraulic cylinder is fixedly installed on the top of the gantry. The telescopic end at the bottom of the second hydraulic cylinder is fixedly connected to the top surface of the sealing cover. Two symmetrically arranged rectangular plates are fixedly installed on both sides of the top of the gantry. Two second electric push rods are fixedly installed on the two rectangular plates. The telescopic ends at the bottoms of the two second electric push rods are fixedly connected to two third U-shaped frames. Two pressing rollers are axially connected to the inner walls of the two third U-shaped frames.

[0012] Preferably, the second position adjusting mechanism includes a fourth motor fixedly installed at the center of the top of the sealing cover. The output shaft of the fourth motor rotates downward through the top of the sealing cover in a sealed manner, and the bottom of its output shaft is fixedly connected to a second mounting plate. A third hydraulic cylinder is fixedly installed on the second mounting plate. The third hydraulic cylinder is driven in the horizontal direction, and its telescopic end is fixedly connected to a fourth hydraulic cylinder. The telescopic end at the bottom of the fourth hydraulic cylinder is fixedly connected to the top of the pressing ring.

[0013] Preferably, the pressing ring includes an outer cylinder. The top of the outer cylinder is fixedly connected to the telescopic end at the bottom of the fourth hydraulic cylinder. An inner cylinder is disposed inside the outer cylinder. The top of the inner cylinder is fixedly connected to the top inside the outer cylinder through a cylinder. The bottom port of the outer cylinder is flush with the bottom port of the inner cylinder, and the two ports are sealed and connected by a ring-shaped rubber. A straight cylinder communicating with the inside of the outer cylinder is fixedly connected to the top of the outer cylinder. A third electric push rod is fixedly installed on the outer wall of the straight cylinder. The telescopic end of the third electric push rod is fixedly connected to a piston slidably sleeved on the inner wall of the straight cylinder. A non-Newtonian fluid is filled in the cavity between the inner cylinder and the outer cylinder and in the straight cylinder. An exhaust pipe is fixedly penetrated through the outer walls of the inner cylinder and the outer cylinder.

[0014] A method for detecting the safety performance of a new energy battery cover plate includes the following steps:

[0015] Step 1, invert the battery cover plate in the support frame. The edge of the battery cover plate is supported at the port of the support frame. The unfolding and retracting mechanism unfolds and tightens the rubber film above the battery cover plate. The sealing cover descends and seals and presses the rubber film at the port of the battery cover.

[0016] Step 2: Connect the air supply valve to an air pump. Open the air supply valve and let the air pump supply air to the sealing cover. The first pressure sensor monitors the pressure inside the sealing cover in real time. When the set pressure is reached, close the air supply valve to stop the air supply. The internal gas presses the rubber film tightly against the inner wall of the battery cover plate.

[0017] Step 3: Adjust the position of the pressing ring through the second position adjustment mechanism, and press the pressing ring downward onto the rubber film in the battery cover plate; adjust the impact component to directly below the pressing ring through the first position adjustment mechanism.

[0018] Step 4: Before the impact component impacts, record the pressure data monitored by the first pressure sensor as P1; set the required impact force F of the impact component , 撞击 , the impact component vertically impacts the battery cover plate directly below the pressing ring, and record the pressure data monitored by the first pressure sensor as P2; then the pressure change amount ΔP = P2 - P1.

[0019] Step 5: Then, the volume occupied by the protrusion formed by the impact component impacting the battery cover plate upward where V1 is the volume between the sealing cover and the rubber film before the impact. Judge the deformation situation according to the value of ΔV.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. In the present invention, by accurately measuring the volume occupied by the protrusion formed after the impact component impacts the battery cover plate upward and comparing and analyzing it with the volume between the sealing cover and the rubber film before the impact, the deformation situation of the battery cover plate can be accurately judged in a quantitative manner, greatly improving the detection accuracy.

[0022] 2. In the present invention, the air pump can be controlled to inflate the cavity to reach the required pressure, and then the required impact force can be achieved.

[0023] 3. In the present invention, the non-Newtonian fluid is filled in the pressing ring. The pressing ring slowly descends to contact the battery cover plate. The non-Newtonian fluid can make the annular rubber adaptively support the shape of the battery cover plate, ensuring full and tight pressing of the battery cover plate, and guaranteeing the uniformity and stability of pressure transmission during the detection process.

[0024] 4. In the present invention, when the impact head impacts, due to the instantaneous force, the non-Newtonian fluid will become as hard as a stone and play an all-round supporting role for the battery cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0026] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the bottom of the support frame of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the first position adjustment mechanism of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the impact component of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the impact head of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the cylinder body of the present invention;

[0032] Figure 7 It is a schematic structural diagram of the sealing cover of the present invention;

[0033] Figure 8 It is a schematic structural diagram of the expansion and contraction mechanism of the present invention;

[0034] Figure 9 It is a schematic structural diagram of the pressure roller of the present invention;

[0035] Figure 10 It is a schematic structural diagram of the second position adjustment mechanism of the present invention;

[0036] Figure 11 It is a schematic cross-sectional structural diagram of the pressure covering ring of the present invention;

[0037] Figure 12 It is a schematic diagram of the sealing cover of the present invention sealing and pressing the rubber film at the port of the battery cover.

[0038] In the figure: 1. Base; 2. Support frame; 3. First position adjustment mechanism; 4. Impact assembly; 5. Folding mechanism; 6. Rubber membrane; 7. Sealing cover; 8. Second position adjustment mechanism; 9. Pressing ring; 10. First pressure sensor; 11. Gas supply valve; 12. Battery cover plate; 201. Support block; 301. Support plate; 302. First motor; 303. First mounting plate; 304. First hydraulic cylinder; 401. Cavity; 402. Cylinder body; 403. Impact head; 4031. Annular groove; 4032. Strip groove; 404. Annular plate; 405. Limiting block; 406. First electric push rod; 407. Movable block; 408. First solenoid valve; 409. Spring; 410. Second pressure sensor; 411. Intake valve; 501. First U-shaped frame; 502. Second motor; 503. First winding wheel; 504. Linear motor; 505. Second U-shaped frame; 506. Third motor; 507. Second winding wheel; 701. Gantry; 702. Second hydraulic cylinder; 703. Rectangular plate; 704. Second electric push rod; 705. Third U-shaped frame; 706. Pressing roller; 801. Fourth motor; 802. Second mounting plate; 803. Third hydraulic cylinder; 804. Fourth hydraulic cylinder; 901. Outer cylinder; 902. Inner cylinder; 903. Cylinder; 904. Annular rubber; 905. Straight cylinder; 906. Third electric push rod; 907. Piston; 908. Non-Newtonian fluid; 909. Exhaust pipe. Detailed implementation manners

[0039] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0040] Please refer to Figures 1 to 12 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in the present invention can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" used in this specification are only for the convenience of clear description and are not used to limit the implementation scope of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can implement.

[0041] The present invention provides a technical solution: The present invention provides a safety performance detection device for a new energy battery cover plate, including a base 1. The base 1 serves as the basic support structure of the entire device and provides a stable platform for the installation of other components. A support frame 2 is installed on the base 1. The bottom of the support frame 2 is fixedly connected to the base 1 through a support block 201. The support block 201 plays a role in stabilizing the support frame 2 to ensure that it does not shake during the detection process. The top port of the support frame 2 is used to support the battery cover plate 12. The battery cover plate 12 is buckled in the support frame 2, and its edge is stably supported at the port of the support frame 2.

[0042] A first position adjustment mechanism 3 is installed in the support frame 2. The first position adjustment mechanism 3 includes a support plate 301 fixedly installed on the top surface of the support block 201. The support plate 301 provides an installation basis for other components of the first position adjustment mechanism 3. A first motor 302 is fixedly installed at the bottom of the support plate 301. After the first motor 302 is started, the first mounting plate 303 axially connected to its output end can be rotationally adjusted in the horizontal direction, thereby changing the position of the impact assembly 4 in the horizontal direction. A first hydraulic cylinder 304 is fixedly installed on the first mounting plate 303. The first hydraulic cylinder 304 can be driven in the horizontal direction, and its telescopic end is fixedly connected to the impact assembly 4. By the telescoping of the first hydraulic cylinder 304, the position of the impact assembly 4 in the horizontal direction can be further accurately adjusted, so that it can accurately align with the position to be detected on the battery cover plate 12.

[0043] The impact component 4 includes a cavity 401 fixedly connected to the telescopic end of the first hydraulic cylinder 304. The cavity 401 serves as the main load-bearing component of the impact component 4. A cylinder body 402 is fixedly connected to the top surface of the cavity 401. An impact head 403 is arranged inside the cylinder body 402. The top of the impact head 403 is hemispherical. Such a shape design is beneficial to concentrating force during impact. An annular groove 4031 is formed in the outer wall of the impact head 403 near the bottom, and a strip-shaped groove 4032 is vertically formed in the outer wall above the annular groove 4031. An annular plate 404 fixedly sleeved on the inner wall of the cylinder body 402 abuts against the bottom of the impact head 403. The annular plate 404 functions to limit the excessive descent of the impact head 403. A limiting block 405 is fixedly connected to the inner wall of the cylinder body 402 near the top port. The outer wall of the limiting block 405 is slidably connected to the inner wall of the strip-shaped groove 4032, which enables the impact head 403 to maintain a stable movement trajectory during the ascending and descending processes and prevents deviation. A first electric push rod 406 is fixedly installed on the outer wall of the cylinder body 402. The telescopic end of the first electric push rod 406 is fixedly connected to a movable block 407. The movable block 407 is slidably inserted through the outer wall of the cylinder body 402. The movable block 407 can be pushed into the annular groove 4031 by the first electric push rod 406, thereby realizing the position locking of the impact head 403. A first solenoid valve 408 communicating with the inside is fixedly installed on the outer wall of the cylinder body 402 above the annular plate 404. A spring 409 is arranged in the cylinder body 402. The two ends of the spring 409 respectively abut tightly against the bottom of the impact head 403 and the top surface of the cavity 401. When no impact operation is performed, the spring 409 is in a compressed state, providing a certain pre-tightening force for the impact head 403. A second pressure sensor 410 communicating with the inside is fixedly installed on the outer wall of the cavity 401, used for monitoring the pressure inside the cavity 401 in real time to accurately control the impact force. An air inlet valve 411 communicating with the inside is also fixedly installed on the outer wall of the cavity 401. The air inlet valve 411 is connected to an air pump. By opening the air inlet valve 411, the air pump can inflate the cavity 401 to provide upward impact power for the impact head 403.

[0044] The unfolding and retracting mechanism 5 is installed on the base 1. The unfolding and retracting mechanism 5 includes a first U-shaped frame 501 fixedly installed on the base 1. A second motor 502 is fixedly installed on the side wall of the first U-shaped frame 501. The output end of the second motor 502 is axially connected to a first winding wheel 503 arranged inside the first U-shaped frame 501. The unfolding and retracting mechanism 5 further includes a linear motor 504 fixedly installed on the base 1. The top of the driving platform of the linear motor 504 is fixedly installed with a second U-shaped frame 505. A third motor 506 is fixedly installed on the side of the second U-shaped frame 505. The output end of the third motor 506 is axially connected to a second winding wheel 507 arranged inside the second U-shaped frame 505. Both ends of the rubber film 6 are wound by the first winding wheel 503 and the second winding wheel 507 respectively. Before detection, the linear motor 504 drives the second U-shaped frame 505 to move away from the first U-shaped frame 501. The second winding wheel 507 pulls the rubber film 6 on the first winding wheel 503, and the first winding wheel 503 releases the rubber film 6, so as to unfold and tighten the rubber film 6 above the battery cover plate 12. The bottom of the second U-shaped frame 505 is arranged higher than the top port of the support frame 2. The heights of the first winding wheel 503 and the second winding wheel 507 are the same. Such a design can ensure that the rubber film 6 remains horizontal during the unfolding process and evenly covers the battery cover plate 12.

[0045] A liftable seal cover 7 is installed above the support frame 2. A gantry 701 is fixedly connected to the base 1. The linear motor 504 is located inside the gantry 701. A second hydraulic cylinder 702 is fixedly installed at the top of the gantry 701. The telescopic end at the bottom of the second hydraulic cylinder 702 is fixedly connected to the top surface of the seal cover 7. The lifting of the seal cover 7 can be realized by the telescopic movement of the second hydraulic cylinder 702. After the rubber film 6 is unfolded and tightened above the battery cover plate 12, two second electric push rods 704 drive two third U-shaped frames 705 to descend, and two pressure rollers 706 press down the rubber film 6 on both sides of the support frame 2 to preliminarily press the rubber film 6 on the port of the battery cover. Subsequently, the second hydraulic cylinder 702 drives the seal cover 7 to descend to hermetically press the rubber film 6 at the port of the battery cover plate to ensure that a sealed space is formed between the seal cover 7 and the battery cover plate 12.

[0046] A second position adjustment mechanism 8 is installed in the sealing cover 7. The second position adjustment mechanism 8 includes a fourth motor 801 fixedly installed at the center of the top of the sealing cover 7. The output shaft of the fourth motor 801 is sealed and rotatably penetrates downward through the top of the sealing cover 7, and the bottom of its output shaft is fixedly connected with a second mounting plate 802. By rotating the fourth motor 801, the second mounting plate 802 can be driven to rotate in the horizontal direction, so as to adjust the position of the pressing ring 9 in the horizontal direction. A third hydraulic cylinder 803 is fixedly installed on the second mounting plate 802. The third hydraulic cylinder 803 is driven in the horizontal direction, and its telescopic end is fixedly connected with a fourth hydraulic cylinder 804. By the telescopic movement of the third hydraulic cylinder 803, the position of the pressing ring 9 in the horizontal direction can be further accurately adjusted. The telescopic end of the bottom of the fourth hydraulic cylinder 804 is fixedly connected with the top of the pressing ring 9. By the telescopic movement of the fourth hydraulic cylinder 804, the lifting of the pressing ring 9 can be controlled.

[0047] The pressing ring 9 includes an outer cylinder 901, and the top of the outer cylinder 901 is fixedly connected with the telescopic end of the bottom of the fourth hydraulic cylinder 804. An inner cylinder 902 is arranged inside the outer cylinder 901, and the top of the inner cylinder 902 is fixedly connected with the top inside the outer cylinder 901 through a column 903. The bottom port of the outer cylinder 901 is flush with the bottom port of the inner cylinder 902, and the two ports are sealed and connected through an annular rubber 904. A straight cylinder 905 communicated with its inside is fixedly connected to the top of the outer cylinder 901. A third electric push rod 906 is fixedly installed on the outer wall of the straight cylinder 905, and the telescopic end of the third electric push rod 906 is fixedly connected with a piston 907 slidably sleeved on the inner wall of the straight cylinder 905. A cavity between the inner cylinder 902 and the outer cylinder 901 and the straight cylinder 905 are filled with non-Newtonian fluid 908. An exhaust pipe 909 is fixedly penetrated through the outer walls of the inner cylinder 902 and the outer cylinder 901. When the battery cover plate 12 impacts the impact test protrusion, the protrusion occupies the internal space of the inner cylinder 902, and the exhaust pipe 909 helps to exhaust. During use, the third electric push rod 906 drives the piston 907 to slowly descend, pushing the non-Newtonian fluid in the straight cylinder 905 into the cavity between the inner cylinder 902 and the outer cylinder 901. The non-Newtonian fluid pushes up the annular rubber 904 downward, and the annular rubber 904 adheres to the battery cover plate 12 downward, including adhering to the groove in the battery cover plate 12, so as to realize the tight pressing of the rubber film 6 on the battery cover plate 12.

[0048] When the impact head 403 impacts, due to the instantaneous force, the non-Newtonian fluid will become as hard as a stone and play a good supporting role for the battery cover plate.

[0049] On the outer wall of the sealing cover 7, a first pressure sensor 10 and a gas supply valve 11 that are connected to its interior are fixedly installed respectively. The gas supply valve 11 is connected to an air pump. When the gas supply valve 11 is opened and the air pump supplies gas to the sealing cover 7, the first pressure sensor 10 monitors the pressure inside the sealing cover 7 in real time. When the set pressure is reached, the gas supply valve 11 is closed to stop the gas supply, and the internal gas tightly presses the rubber membrane 6 against the inner wall of the battery cover plate 12.

[0050] A safety performance detection device for a new energy battery cover plate further includes a controller for data processing and control of each unit.

[0051] A safety performance detection method for a new energy battery cover plate includes the following steps:

[0052] Step 1: Invert the battery cover plate 12 in the support frame 2. The edge of the battery cover plate 12 is supported at the port of the support frame 2. The linear motor 504 drives the second U-shaped frame 505 to move away from the first U-shaped frame 501. The second winding wheel 507 pulls the rubber membrane 6 on the first winding wheel 503. The first winding wheel 503 releases the rubber membrane 6 and unfolds the rubber membrane 6 above the battery cover plate 12 and tightens it.

[0053] Two second electric push rods 704 drive two third U-shaped frames 705 to descend. Two pressure rollers 706 press down on the rubber membrane 6 on both sides of the support frame 2 and press the rubber membrane 6 against the port of the battery cover.

[0054] The second hydraulic cylinder 702 drives the sealing cover 7 to descend and seals and presses the rubber membrane 6 against the port of the battery cover plate.

[0055] Step 2: The gas supply valve 11 is connected to an air pump. When the gas supply valve 11 is opened and the air pump supplies gas to the sealing cover 7, the first pressure sensor 10 monitors the pressure inside the sealing cover 7 in real time. When the set pressure is reached, the gas supply valve 11 is closed to stop the gas supply, and the internal gas tightly presses the rubber membrane 6 against the inner wall of the battery cover plate 12.

[0056] Step 3: Adjust the horizontal position of the pressing ring 9 through the fourth motor 801 and the third hydraulic cylinder 803. The fourth hydraulic cylinder 804 drives the pressing ring 9 to move downward close to the rubber membrane 6 in the battery cover plate 12 with a gap left. The third electric push rod 906 drives the piston 907 to slowly descend, pushing the non-Newtonian fluid in the straight cylinder 905 into the cavity between the inner cylinder 902 and the outer cylinder 901. The non-Newtonian fluid supports the ring-shaped rubber 904 downward, and the ring-shaped rubber 904 adheres to the battery cover plate 12 downward, including adhering to the groove in the battery cover plate 12.

[0057] Adjust the horizontal position of the impact component 4 through the first motor 302 and the first hydraulic cylinder 304. The first position adjustment mechanism 3 adjusts the impact component 4 to directly below the pressing ring 9.

[0058] Step 4, before the impact component 4 impacts, the controller records the pressure data monitored by the first pressure sensor 10 as P1;

[0059] The intake valve 411 is connected to an air pump. When the intake valve 411 is opened, the air pump inflates the cavity 401. The second pressure sensor 410 monitors the pressure P3 in the cavity 401 in real time. Then the thrust of the air pressure received at the bottom of the impact head 403 is F1 = P3 * S, and F2 is the initial thrust of the spring 409;

[0060] The instantaneous impact force during impact needs to be calculated through the following steps:

[0061] The velocity during impact

[0062] Then the impact force: H is the distance from the top of the impact head 403 to the battery cover plate, m is the mass of the impact head, k is the spring stiffness, and Δt is the impact time;

[0063] Before impact, the required impact force data is input through the controller, and then the controller controls the air pump to inflate the cavity 401 to reach the required pressure. The pressure is fed back to the controller by the second pressure sensor 410 in real time;

[0064] The first electric push rod 406 pulls out the movable block 407 from the annular groove 4031 and simultaneously opens the first solenoid valve 408;

[0065] Under the main action of the air pressure, the impact head 403 impacts upward, and then the air pressure is released by the first solenoid valve 408. Then the air pressure gives an instantaneous thrust F1 to the impact head 403;

[0066] The impact head 403 impacts vertically upward on the battery cover plate 12 directly below the pressure - covering ring 9, and the controller records the pressure data monitored by the first pressure sensor 10 as P2; Then the pressure change amount ΔP = P2 - P1;

[0067] Step 5, then the volume of the bulge formed by the impact component 4 impacting the battery cover plate 12 upward Where V1 is the volume between the sealing cover 7 and the rubber film 6 before impact. The deformation situation is judged according to the value of ΔV.

[0068] After the test is completed, the first solenoid valve 408 is closed, and the air pump sucks air to make the inside of the cavity 401 form a negative pressure, thereby causing the impact head 403 to descend and reset.

[0069] Multiple - point tests can be carried out during the test.

[0070] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A safety performance detection device for a new energy battery cover plate, comprising a base (1), characterized in that: A support frame (2) is installed on the base (1), and its top port is used to support the battery cover plate; a first position adjustment mechanism (3) is installed in the support frame (2), and an impact component (4) is drivably installed on the first position adjustment mechanism (3); a retractable mechanism (5) is installed on the base (1), and a rubber film (6) is wound in the retractable mechanism (5) for retracting and extending the rubber film (6) at the port of the support frame (2); a liftable sealing cover (7) is installed above the support frame (2) for sealing and pressing the rubber film (6) on the port of the battery cover; a second position adjustment mechanism (8) is installed in the sealing cover (7), and a pressing ring (9) is drivably installed on the second position adjustment mechanism (8) for pressing down the rubber film (6) on the battery cover plate; the impact component (4) vertically impacts the battery cover plate directly below the pressing ring (9), and a first pressure sensor (10) and a gas supply valve (11) communicating with its interior are respectively fixedly installed on the outer wall of the sealing cover (7).

2. The safety performance detection device for a new energy battery cover plate according to claim 1, characterized in that: A support block (201) is fixedly connected to the bottom of the support frame (2), and the bottom of the support block (201) is fixedly connected to the top surface of the base (1).

3. The safety performance detection device for a new energy battery cover plate according to claim 2, wherein: The first position adjustment mechanism (3) includes a support plate (301) fixedly installed on the top surface of the support block (201), a first motor (302) is fixedly installed at the bottom of the support plate (301), the output end of the first motor (302) is axially connected to a first mounting plate (303) arranged above the support plate (301), a first hydraulic cylinder (304) is fixedly installed on the first mounting plate (303), the first hydraulic cylinder (304) is driven in the horizontal direction, and its telescopic end is fixedly connected to the impact component (4).

4. The safety performance detection device for a new energy battery cover plate according to claim 1, wherein: The impact assembly (4) includes a cavity (401) fixedly connected to the telescopic end of the first hydraulic cylinder (304). The top surface of the cavity (401) is fixedly connected to a cylinder body (402). A through hole is provided on the top surface of the cavity (401) inside the cylinder body (402). The inner wall of the cylinder body (402) is slidably sleeved with an impact head (403). An annular groove (4031) is provided on the outer wall of the impact head (403) near the bottom, and a strip-shaped groove (4032) is vertically provided on the outer wall above the annular groove (4031). An annular plate (404) that abuts against the bottom of the impact head (403) is fixedly sleeved on the inner wall of the cylinder body (402), and a limiting block (405) is fixedly connected to the inner wall near the top port. The outer wall of the limiting block (405) is slidably connected to the inner wall of the strip-shaped groove (4032). A first electric push rod (406) is fixedly installed on the outer wall of the cylinder body (402). The telescopic end of the first electric push rod (406) is fixedly connected to a movable block (407). The movable block (407) is slidably inserted through the outer wall of the cylinder body (402). The movable block (407) can be pushed into the annular groove (4031) by the first electric push rod (406). A first electromagnetic valve (408) communicating with its interior is fixedly installed on the outer wall of the cylinder body (402) above the annular plate (404). A spring (409) is provided in the cylinder body (402). The two ends of the spring (409) respectively abut against the bottom of the impact head (403) and the top surface of the cavity (401). The top of the impact head (403) is hemispherical. A second pressure sensor (410) communicating with its interior is fixedly installed on the outer wall of the cavity (401), and an air inlet valve (411) communicating with its interior is fixedly installed on the outer wall of the cavity (401).

5. The safety performance detection device for a new energy battery cover plate according to claim 1, wherein: The unfolding and folding mechanism (5) includes a first U-shaped frame (501) fixedly installed on the base (1). A second motor (502) is fixedly installed on the side wall of the first U-shaped frame (501). The output end of the second motor (502) is axially connected to a first winding wheel (503) arranged inside the first U-shaped frame (501). The unfolding and folding mechanism (5) further includes a linear motor (504) fixedly installed on the base (1). The top of the driving platform of the linear motor (504) is fixedly installed with a second U-shaped frame (505). A third motor (506) is fixedly installed on the side of the second U-shaped frame (505). The output end of the third motor (506) is axially connected to a second winding wheel (507) arranged inside the second U-shaped frame (505). Both ends of the rubber film (6) are wound by the first winding wheel (503) and the second winding wheel (507) respectively. The bottom of the second U-shaped frame (505) is higher than the top port of the support frame (2). The first winding wheel (503) and the second winding wheel (507) are at the same height.

6. The safety performance detection device for a new energy battery cover plate according to claim 5, wherein: A gantry (701) is fixedly connected to the base (1). The linear motor (504) is located inside the gantry (701). A second hydraulic cylinder (702) is fixedly installed at the top of the gantry (701). The telescopic end at the bottom of the second hydraulic cylinder (702) is fixedly connected to the top surface of the sealing cover (7). Two symmetrically arranged rectangular plates (703) are fixedly installed on both sides of the top of the gantry (701). Two second electric push rods (704) are fixedly installed on the two rectangular plates (703). The telescopic ends at the bottoms of the two second electric push rods (704) are fixedly connected to two third U-shaped frames (705). Two pressure rollers (706) are axially connected to the inner walls of the two third U-shaped frames (705).

7. The safety performance detection device for a new energy battery cover plate according to claim 1, wherein: The second position adjusting mechanism (8) includes a fourth motor (801) fixedly installed at the center of the top of the sealing cover (7). The output shaft of the fourth motor (801) is rotationally and downwardly passed through the top of the sealing cover (7) in a sealed manner, and the bottom of its output shaft is fixedly connected to a second mounting plate (802); A third hydraulic cylinder (803) is fixedly installed on the second mounting plate (802). The third hydraulic cylinder (803) is driven in the horizontal direction, and its telescopic end is fixedly connected to a fourth hydraulic cylinder (804); The telescopic end at the bottom of the fourth hydraulic cylinder (804) is fixedly connected to the top of the pressing ring (9).

8. An apparatus for detecting the safety performance of a cover plate of a new energy battery according to claim 7, characterized in that: The pressing ring (9) includes an outer cylinder (901). The top of the outer cylinder (901) is fixedly connected to the telescopic end at the bottom of the fourth hydraulic cylinder (804). An inner cylinder (902) is arranged inside the outer cylinder (901). The top of the inner cylinder (902) is fixedly connected to the top inside the outer cylinder (901) through a column (903). The bottom port of the outer cylinder (901) is flush with the bottom port of the inner cylinder (902), and the two ports are sealed and connected through an annular rubber (904). A straight cylinder (905) communicating with its inside is fixedly connected to the top of the outer cylinder (901). A third electric push rod (906) is fixedly installed on the outer wall of the straight cylinder (905). The telescopic end of the third electric push rod (906) is fixedly connected to a piston (907) slidably sleeved on the inner wall of the straight cylinder (905). A non-Newtonian fluid (908) is filled in the cavity between the inner cylinder (902) and the outer cylinder (901), and in the straight cylinder (905); An exhaust pipe (909) is fixedly penetrated through the outer walls of the inner cylinder (902) and the outer cylinder (901).

9. A method for detecting the safety performance of a new energy battery cover plate, characterized in that, Using a new energy battery cover safety performance detection device according to any one of claims 1-8, comprising the following steps: Step 1, place the battery cover (12) upside down in the support frame (2). The edge of the battery cover (12) is supported at the port of the support frame (2). The expansion and contraction mechanism (5) unfolds and tightens the rubber film (6) above the battery cover (12); The sealing cover (7) descends to seal and press the rubber film (6) at the port of the battery cover. Step 2: Connect the air supply valve (11) to an air pump. Open the air supply valve (11) and let the air pump supply air into the sealing cover (7). The first pressure sensor (10) monitors the pressure inside the sealing cover (7) in real time. When the set pressure is reached, close the air supply valve (11) to stop the air supply, and the internal gas will tightly press the rubber membrane (6) against the inner wall of the battery cover plate (12). Step 3: Adjust the position of the pressing ring (9) through the second position adjusting mechanism (8), and press the pressing ring (9) downward onto the rubber membrane (6) in the battery cover plate (12); adjust the impact assembly (4) to directly below the pressing ring (9) through the first position adjusting mechanism (3). Step 4, before the impact component (4) impacts, record the pressure data monitored by the first pressure sensor (10) as P1; set the required impact force F of the impact component (4) 撞击 , the impact component (4) vertically impacts the battery cover plate (12) directly below the pressure covering ring (9), and record the pressure data monitored by the first pressure sensor (10) as P2; then the pressure change amount ΔP = P2 - P1; Step Five, the volume occupied by the protrusion formed when the impact component (4) impacts the battery cover plate (12) upward where V1 is the volume between the seal cover (7) and the rubber membrane (6) before impact, and the deformation situation is judged according to the value of ΔV.

Images