Acupuncture test equipment for safety analysis of lithium ion battery

Abstract

The invention relates to acupuncture test equipment for safety analysis of a lithium ion battery, which comprises a test machine body, a clamp and a telescopic column are arranged in the test machine body, a puncture needle is arranged on the bottom side of the telescopic column, and a box door is arranged on the test machine body; the bottom side of the test machine body is movably provided with an explosion-proof box, the explosion-proof box is provided with an observation window, the explosion-proof box is internally provided with an active separation device, and the active separation device is used for separating the clamp and the puncture needle from the test machine body. It needs to be explained that in the embodiment of the invention, after the lithium battery is pierced by the piercing needle, the mounting seat drives the lithium battery to enter the explosion-proof box for observation, and the test machine body is separated from the explosion-proof box, so that the problem that the test host is damaged when the lithium battery is on fire or explodes is avoided; in addition, the explosion-proof box can be convenient to maintain or replace, and maintenance of test equipment is not involved, so that the use cost is lower.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery puncture test equipment, in particular to a puncture test equipment for lithium ion battery safety analysis. Background Art

[0002] The lithium battery puncture test is a test method that simulates the impact or puncture of a lithium battery by a sharp object in actual use. Its purpose is to evaluate the safety and stability of the lithium battery when it is subjected to external force impact.

[0003] In the needle penetration test, a thin metal needle is usually used to pierce any position of the lithium battery to simulate the situation where the battery is hit or punctured by a sharp object. This process will cause a short circuit in the positive and negative electrode materials inside the battery, resulting in the conversion of the battery's electrical energy into heat energy. During the test, the battery is usually fully charged. After the needle penetration, the battery's reaction is observed, including voltage changes, temperature rise, smoke, fire, etc. Through these reactions, the battery's safety performance can be evaluated, such as whether thermal runaway will occur; in addition, the needle penetration test can also reveal the performance of the battery separator, because once the separator is punctured, it will cause an internal short circuit, which will cause a rapid increase in the battery temperature. If the battery does not catch fire or explode after the needle penetration, it is generally considered qualified.

[0004] The lithium battery puncture test is to install the lithium battery on the fixture of the test equipment, and install the puncture needle on the telescopic column, and then pierce the puncture needle into the lithium battery by moving the telescopic column. If the lithium battery does not catch fire or explode, it is usually considered qualified. However, once a serious fire or even an explosion occurs, the equipment inside the test equipment will be quickly burned. Since this happens very quickly and the fire of the lithium battery spreads quickly, it is impossible to effectively prevent the test equipment from being burned by extinguishing the fire alone. After the related equipment in the test equipment is damaged, it can only be replaced, which brings huge economic losses to the company. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a needle penetration test equipment for lithium-ion battery safety analysis, which can maintain the stable operation of the power grid, quickly and accurately provide the optimal load transfer plan, greatly improve the work efficiency of the dispatcher, and ensure the safe and stable operation of the power grid.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] A needle puncture test device for lithium-ion battery safety analysis, comprising a test body, a fixture and a telescopic column are installed in the test body, a puncture needle is installed on the bottom side of the telescopic column, and a box door is installed on the test body;

[0008] An explosion-proof box is movably installed on the bottom side of the test fuselage, an observation window is installed on the explosion-proof box, an active separation device is installed in the explosion-proof box, and the active separation device is used to separate the clamp and the puncture needle from the test fuselage; the active separation device includes a retractable base and a mounting seat, the retractable base is movably installed in the explosion-proof box, the clamp is installed on the retractable base, the retractable base is moved downward to retract the clamp into the explosion-proof box, the mounting seat is installed on the bottom side of the telescopic column, the puncture needle is plugged into the mounting seat, and a clamping plate is movably installed on the bottom side of the mounting seat, and the clamping plate is used to clamp the puncture needle on the mounting seat;

[0009] It also includes a top closing device, which is rotatably mounted in the explosion-proof box and is used to close the top side of the explosion-proof box; the top closing device includes two top sealing plates, which are rotatably mounted on the inner walls of both sides of the explosion-proof box, and the top sides of the two top sealing plates are in contact with the bottom side of the test fuselage, and the two top sealing plates are rotatably used to close the top side of the explosion-proof box;

[0010] It also includes a covering fire extinguishing device, which is installed on both sides of the explosion-proof box, and is used to cover and extinguish the test batteries in the explosion-proof box; the covering fire extinguishing device includes two loading boxes, both sides of the explosion-proof box are opened, and the two loading boxes are connected to the explosion-proof box. A spreading box is movably installed in the loading box, and the spreading box is filled with sand. The spreading box extends into the explosion-proof box and is used to sprinkle sand on the test batteries in the explosion-proof box.

[0011] Moreover, the active separation device further comprises two sliding plates, the sliding plates are slidably mounted on the inner wall of the bottom side of the test fuselage, and push-pull frames are mounted on both sides of the clamping plate, and the two push-pull frames are slidably mounted on the two sliding plates respectively;

[0012] The sliding plate is provided with a lifting slot, and the push-pull frame is slidably installed in the lifting slot.

[0013] Moreover, two sliding grooves are provided on the inner wall of the bottom side of the test fuselage, and the two sliding plates are slidably installed in the two sliding grooves respectively;

[0014] A pressing spring is installed on the inner wall of the sliding groove, and the other end of the pressing spring is installed on one side of the sliding plate.

[0015] Moreover, an extrusion frame is installed on one side of the card board, an extrusion wheel is rotatably installed on the extrusion frame, an adaption groove is opened on one side of the card board, the puncture needle passes through the adaption groove, a slot is opened on the bottom side of the mounting seat, a socket is inserted in the slot, and the puncture needle is installed on the bottom side of the socket;

[0016] A wedge block is movably mounted on an inner wall of one side of the test body through bolts, and the wedge block is used to squeeze the squeezing wheel, and drive the clamping plate to separate from the puncture needle through the squeezing frame.

[0017] Moreover, two connecting seats are installed on the top side of the retractable base, one side of the two connecting seats is provided with a locking groove, and the sides of the two sliding plates close to each other are provided with a locking frame, and the two locking frames are respectively inserted into the two locking grooves;

[0018] A lifting plate is installed on the bottom side of the retractable base, and the lifting plate is slidably installed on the inner walls on both sides of the explosion-proof box.

[0019] Moreover, the top closing device further comprises a pull-down plate, and the pull-down plate is movably mounted on the inner walls of both sides of the explosion-proof box;

[0020] Two pull-down rods are installed on the top side of the pull-down plate, two mounting shafts are rotatably installed in the explosion-proof box, the two top sealing plates are respectively installed on the two mounting shafts, and the two pull-down rods are respectively connected to the two mounting shafts.

[0021] Moreover, a pull rod is installed on the installation shaft, and a pull rod is rotatably installed on one side of the pull rod and the lower pull rod;

[0022] Two pulling shafts are rotatably mounted on the pulling rod, and the two pulling shafts are respectively mounted on the pulling rod and the lower pulling rod.

[0023] Moreover, a driven bar is installed on one side of the dispensing box, and a push rod is rotatably installed on one side of the loading box, and the push rod is movably installed on the driven bar;

[0024] A rotating seat is installed on one side of the loading box, and the ejection rod is rotatably installed on the rotating seat.

[0025] Moreover, a lifting frame is movably mounted on the bottom side of the two loading boxes, and the two lifting frames are movably mounted on one side of the two ejection rods respectively;

[0026] A pressing frame is installed on the two lifting frames, and stepping on the pressing frame drives the two lifting frames to move at the same time.

[0027] Moreover, two torsion shafts are installed on the ejection rod, one of the torsion shafts is movably installed on the driven bar, a torsion groove is provided on the rotating seat, and the other torsion shaft is rotatably installed in the torsion groove;

[0028] A movable hole is provided on the ejection rod, a transfer shaft is rotatably mounted on the lifting frame, and the transfer shaft is movably mounted in the movable hole;

[0029] A torsion spring is installed in the torsion groove, and the other end of the torsion spring is installed on the torsion shaft.

[0030] The advantages and positive effects of the present invention are:

[0031] The present invention includes a test fuselage, in which a clamp and a telescopic column are installed, a puncture needle is installed on the bottom side of the telescopic column, and a box door is installed on the test fuselage; an explosion-proof box is movably installed on the bottom side of the test fuselage, an observation window is installed on the explosion-proof box, and an active separation device is installed in the explosion-proof box, and the active separation device is used to separate the clamp and the puncture needle from the test fuselage. It should be noted that in the embodiment of the present invention, after the lithium battery is pierced by the puncture needle, the mounting seat drives the lithium battery into the explosion-proof box for observation, and isolates the test fuselage from the explosion-proof box to avoid the problem of damage to the test host when the lithium battery catches fire or explodes; in addition, the explosion-proof box can be easily repaired or replaced, and does not involve the maintenance of the test equipment, so the cost of use is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of a needle penetration test device for safety analysis of lithium-ion batteries according to the present invention;

[0033] Figure 2 It is a partial cross-sectional structural schematic diagram of a needle penetration test device for safety analysis of lithium-ion batteries according to the present invention;

[0034] Figure 3 It is a schematic structural diagram of a telescopic column and a retractable base and other structures of a needle penetration test device for safety analysis of lithium-ion batteries according to the present invention;

[0035] Figure 4 It is a partial structural schematic diagram of the connection between the cardboard and the extrusion frame and other structures of the needle penetration test equipment for lithium ion battery safety analysis of the present invention;

[0036] Figure 5 It is a schematic structural diagram of the connection between a telescopic column and a mounting seat and other structures of a needle penetration test device for lithium-ion battery safety analysis according to the present invention;

[0037] Figure 6It is a schematic structural diagram of a push-pull frame and a sliding plate and other structures of a needle penetration test device for safety analysis of lithium-ion batteries according to the present invention;

[0038] Figure 7 The present invention is a kind of acupuncture test equipment for lithium ion battery safety analysis Figure 3 The structural diagram of part A in the figure;

[0039] Figure 8 It is a schematic diagram of a partial fracture structure of a connection between a top sealing plate and a mounting shaft and other structures of a needle penetration test device for safety analysis of lithium-ion batteries according to the present invention;

[0040] Fig. 9 It is a schematic structural diagram of the connection between the retractable base and the top sealing plate and other structures of a needle penetration test device for lithium-ion battery safety analysis according to the present invention;

[0041] Fig.10 It is a structural schematic diagram of the connection between an explosion-proof box and a pull-down plate and other structures of a needle penetration test device for safety analysis of lithium-ion batteries according to the present invention;

[0042] Fig.11 It is a partial structural schematic diagram of the connection between the discharge box and the driven bar and other structures of the needle penetration test equipment for lithium ion battery safety analysis of the present invention;

[0043] Fig.12 It is a partial structural schematic diagram of the connection between the ejection rod and the lifting frame and other structures of the needle penetration test equipment for lithium-ion battery safety analysis of the present invention;

[0044] Fig.13 The present invention is a partial cross-sectional structural schematic diagram of the connection between a rotating seat and a push rod and other structures of a needle penetration test device for safety analysis of lithium-ion batteries.

[0045] Description of labels:

[0046] 1-test fuselage; 2-fixture; 3-telescopic column; 4-puncture needle; 5-explosion-proof box; 6-active separation device; 601-retractable base; 602-mounting seat; 603-slot; 604-plug seat; 605-card; 606-adapter slot; 607-push-pull frame; 608-sliding slot; 609-sliding plate; 610-lifting slot; 611-connecting seat; 612-locking frame; 613-locking slot; 614-extrusion spring; 615-extrusion frame; 616-extrusion wheel; 617-wedge block; 618-lifting plate ;7-top closing device;701-top sealing plate;702-pull-down plate;703-installing shaft;704-pull rod;705-pull rod;706-pull-down rod;707-pull shaft;8-covering fire extinguishing device;801-loading box;802-dispensing box;803-driven bar;804-rotating seat;805-push rod;806-lifting frame;807-adapter shaft;808-movable hole;809-pressing frame;810-torsion shaft;811-torsion groove;812-torsion spring;9-observation window;10-box door. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to the accompanying drawings.

[0048] like Figures 1 to 13 As shown, an embodiment of the present invention provides a puncture test device for safety analysis of lithium-ion batteries, which includes a test body 1, a fixture 2 and a telescopic column 3 are installed in the test body 1, a puncture needle 4 is installed on the bottom side of the telescopic column 3, and a box door 10 is installed on the test body 1;

[0049] In addition, an explosion-proof box 5 is movably installed on the bottom side of the test fuselage 1, an observation window 9 is installed on the explosion-proof box 5, and an active separation device 6 is installed in the explosion-proof box 5, and the active separation device 6 is used to separate the clamp 2 and the puncture needle 4 from the test fuselage 1; the active separation device 6 includes a retractable base 601 and a mounting seat 602, the retractable base 601 is movably installed in the explosion-proof box 5, the clamp 2 is mounted on the retractable base 601, the retractable base 601 is moved downward to retract the clamp 2 into the explosion-proof box 5, the mounting seat 602 is installed on the bottom side of the telescopic column 3, the puncture needle 4 is plugged into the mounting seat 602, and a clamping plate 605 is movably installed on the bottom side of the mounting seat 602, and the clamping plate 605 is used to clamp the puncture needle 4 on the mounting seat 602.

[0050] In the embodiment of the present invention, by setting the explosion-proof box 5, after the lithium battery is pierced by the puncture needle 4, the user enters the explosion-proof box 5 for observation, thereby avoiding the problem of damaging the test host when the lithium battery catches fire or explodes, and the explosion-proof box 5 can be easily repaired or replaced, and does not involve the maintenance of the test equipment, so the use cost is lower; in addition, by setting the active separation device 6, when conducting the puncture test of the lithium battery, the lithium battery is installed on the fixture 2, and then the mounting seat 602 is driven to move by the telescopic column 3, so that the mounting seat 602 drives the puncture needle 4 to penetrate the lithium battery. After the penetration reaches a certain depth, the mounting seat 602 moves to drive the card plate 605 to move downward, and the card plate 605 moves to simultaneously drive the two push-pull frames 607 and the extrusion frame 615 to move downward, and the push-pull frame 607 moves vertically downward in the lifting slot 610;

[0051] The telescopic column 3 is continuously moved downward, so that the card plate 605 drives the extrusion frame 615 to continuously move downward, and the extrusion frame 615 moves to drive the extrusion wheel 616 to contact the wedge block 617, so that the wedge block 617 squeezes the extrusion wheel 616, thereby driving the extrusion frame 615 to move horizontally, and the extrusion frame 615 drives the card plate 605 to move horizontally, and the card plate 605 drives the two sliding plates 609 to move horizontally through the two push-pull frames 607, and the sliding plates 609 move horizontally in the sliding groove 608 and compress the extrusion spring 614, so that the card plate 605 is separated from the socket 604; at the same time, the sliding plate 609 moves with The movable locking frame 612 disengages from the locking groove 613. At this time, under the action of the gravity of the lithium battery, the retractable base 601 moves downward, and the retractable base 601 moves vertically downward in the explosion-proof box 5 through the lifting plate 618, so that the retractable base 601 drives the lithium battery to move into the explosion-proof box 5 through the clamp 2, and the lithium battery simultaneously drives the puncture needle 4 to move into the explosion-proof box 5. At this time, observing the lithium battery in the explosion-proof box 5 can effectively avoid accidents when the lithium battery is punctured, thereby preventing the equipment in the test fuselage 1 from being damaged, thereby ensuring the safe use of the test fuselage 1.

[0052] A needle penetration test device for lithium-ion battery safety analysis provided by an embodiment of the present invention further includes a top closing device 7, which is rotatably installed in an explosion-proof box 5, and is used to close the top side of the explosion-proof box 5; specifically, the top closing device 7 includes two top sealing plates 701, which are rotatably installed on the inner walls of both sides of the explosion-proof box 5, and the top sides of the two top sealing plates 701 are in contact with the bottom side of the test fuselage 1, and the two top sealing plates 701 are rotated to close the top side of the explosion-proof box 5;

[0053] And it also includes a covering fire extinguishing device 8, which is installed on both sides of the explosion-proof box 5, and the covering fire extinguishing device 8 is used to cover and extinguish the test batteries in the explosion-proof box 5; specifically, the covering fire extinguishing device 8 includes two loading boxes 801, and the two sides of the explosion-proof box 5 are opened. The two loading boxes 801 are connected to the explosion-proof box 5, and a spreading box 802 is movably installed in the loading box 801. The spreading box 802 is filled with sand, and the spreading box 802 extends into the explosion-proof box 5 to sprinkle sand on the test batteries in the explosion-proof box 5.

[0054] In the embodiment of the present invention, through the setting of the top closing device 7, when the retracting base 601 is retracted into the explosion-proof box 5, it falls on the lower pull plate 702, so that the lower pull plate 702 is forced to move downward, and the lower pull plate 702 slides vertically in the explosion-proof box 5. At the same time, the movement of the lower pull plate 702 drives the two lower pull rods 706 to move. The movement of the lower pull rod 706 drives the pull rod 705 to move through a pull shaft 707. The pull rod 705 drives the pull rod 704 to rotate through another pull shaft 707, so that the pull rod 704 can rotate. The movable rod 704 drives the installation shaft 703 to rotate, and the rotation of the installation shaft 703 drives the top sealing plate 701 to rotate, so that the two top sealing plates 701 can seal the top side of the explosion-proof box 5, and then when the lithium battery is retracted into the explosion-proof box 5, the two top sealing plates 701 can automatically seal the top of the explosion-proof box 5, thereby achieving the purpose of fully isolating the test fuselage 1 from the explosion-proof box 5, and avoiding the problem that the test fuselage 1 will be damaged if a fire or explosion occurs when the lithium battery is punctured;

[0055] In the embodiment of the present invention, by setting the covering fire extinguishing device 8, after the lithium battery falls into the explosion-proof box 5, if the lithium battery catches fire or even explodes, the pressing frame 809 is stepped on in time, so that the pressing frame 809 drives the two lifting frames 806 to move synchronously, and the lifting frames 806 move to drive the ejection rod 805 to rotate through the adapter shaft 807, and the adapter shaft 807 slides in the movable hole 808, and the ejection rod 805 rotates to drive the driven bar 803 to move through a torsion shaft 810, and the torsion shaft 810 slides in the driven bar 803, thereby The driven bar 803 pushes the scattering box 802 into the explosion-proof box 5; at the same time, the scattering box 802 sprinkles sand on the lithium battery to extinguish and insulate the lithium battery, and can cover the liquid flowing out of the lithium battery, which can not only play a good role in preventing the spread of fire, but also effectively extinguish the fire; in addition, the push rod 805 rotates through another torsion shaft 810 in the torsion groove 811, and drives the torsion spring 812 to be stressed, so the resilience of the torsion spring 812 can help the push rod 805 to reset, thereby making it easier for the scattering box 802 to reset.

[0056] like Figure 3-7As shown, an embodiment of the present invention provides a needle penetration test equipment for safety analysis of lithium-ion batteries, wherein the active separation device 6 also includes two sliding plates 609, which are slidably installed on the bottom inner wall of the test body 1, and push-pull frames 607 are installed on both sides of the clamping plate 605, and the two push-pull frames 607 are slidably installed on the two sliding plates 609 respectively; in addition, a lifting groove 610 is opened on the sliding plate 609, and the push-pull frame 607 is slidably installed in the lifting groove 610.

[0057] In the embodiment of the present invention, when conducting a puncture test on a lithium battery, the lithium battery is mounted on the fixture 2, and then the mounting seat 602 is driven to move by the telescopic column 3, so that the mounting seat 602 drives the puncture needle 4 to penetrate the lithium battery. After penetration to a certain depth, the mounting seat 602 moves to drive the card plate 605 to move downward, and the movement of the card plate 605 simultaneously drives the two push-pull frames 607 and the extrusion frame 615 to move downward, thereby achieving the purpose of vertically moving the push-pull frame 607 downward in the lifting slot 610.

[0058] In the embodiment of the present invention, two sliding grooves 608 are provided on the inner wall of the bottom side of the test fuselage 1, and two sliding plates 609 are respectively slidably installed in the two sliding grooves 608; a compression spring 614 is installed on the inner wall of the sliding groove 608, and the other end of the compression spring 614 is installed on one side of the sliding plate 609. It should be noted that in the embodiment of the present invention, when the card plate 605 moves horizontally, the card plate 605 drives the two sliding plates 609 to move horizontally through the two push-pull frames 607, and the sliding plates 609 move horizontally in the sliding groove 608 and compress the compression spring 614.

[0059] like Figure 3-7 As shown, in the embodiment of the present invention, a pressing frame 615 is installed on one side of the card plate 605, and a pressing wheel 616 is rotatably installed on the pressing frame 615. An adapting groove 606 is provided on one side of the card plate 605, and the puncture needle 4 passes through the adapting groove 606. A slot 603 is provided on the bottom side of the mounting seat 602, and a plug seat 604 is plugged into the slot 603. The puncture needle 4 is installed on the bottom side of the plug seat 604;

[0060] In addition, a wedge block 617 is movably installed on the inner wall of one side of the test fuselage 1 through a bolt, and the wedge block 617 is used to squeeze the squeezing wheel 616, and drive the card plate 605 to disengage from the puncture needle 4 through the squeezing frame 615. It should be noted that in the embodiment of the present invention, after the puncture needle 4 pierces the lithium battery, as the telescopic column 3 continues to move downward, the card plate 605 drives the squeezing frame 615 to move downward continuously, and then the wedge block 617 squeezes the squeezing wheel 616, and then drives the squeezing frame 615 to move horizontally, and the squeezing frame 615 drives the card plate 605 to move horizontally, and the card plate 605 drives the two sliding plates 609 to move horizontally through the two push-pull frames 607, and the sliding plates 609 move horizontally in the sliding groove 608, and compress the squeezing spring 614, so that the card plate 605 is separated from the socket 604, and then when the lithium battery enters the explosion-proof box 5, the puncture needle 4 can be brought into the explosion-proof box 5 synchronously to ensure the normal progress of the test.

[0061] In the embodiment of the present invention, two connecting seats 611 are installed on the top side of the retractable base 601, and a locking groove 613 is opened on one side of the two connecting seats 611. A locking frame 612 is installed on the side of the two sliding plates 609 close to each other, and the two locking frames 612 are respectively inserted into the two locking grooves 613;

[0062] In addition, a lifting plate 618 is installed on the bottom side of the retracting base 601, and the lifting plate 618 is slidably installed on the inner walls of both sides of the explosion-proof box 5. It should be noted that in the embodiment of the present invention, when the telescopic column 3 continues to move downward, the extrusion frame 615 is squeezed and moved horizontally by the wedge block 617, and then the extrusion frame 615 drives the card plate 605 to move horizontally, and then drives the sliding plate 609 to move, and the movement of the sliding plate 609 drives the locking frame 612 to disengage from the locking groove 613. At this time, under the gravity of the lithium battery, the retracting base 601 moves downward, and the retracting base 601 moves vertically downward in the explosion-proof box 5 through the lifting plate 618, so that the retracting base 601 drives the lithium battery to move into the explosion-proof box 5 through the clamp 2.

[0063] like Figure 8-9 As shown, an embodiment of the present invention provides a needle penetration test device for lithium-ion battery safety analysis, wherein the top closing device 7 further includes a pull-down plate 702, and the pull-down plate 702 is movably mounted on the inner walls of both sides of the explosion-proof box 5;

[0064] In addition, two pull-down rods 706 are installed on the top side of the pull-down plate 702 , two mounting shafts 703 are rotatably installed in the explosion-proof box 5 , two top sealing plates 701 are respectively installed on the two mounting shafts 703 , and two pull-down rods 706 are respectively connected to the two mounting shafts 703 . It should be noted that, in the embodiment of the present invention, when the retractable base 601 is retracted into the explosion-proof box 5, it falls on the pull-down plate 702, so that the pull-down plate 702 is forced to move downward, and the pull-down plate 702 slides vertically in the explosion-proof box 5. At the same time, when the pull-down plate 702 moves, the two pull-down rods 706 drive the two pulling rods 705 to move, and the pulling rod 705 drives the installation shaft 703 to rotate through the pull rod 704. The rotation of the installation shaft 703 drives the top sealing plate 701 to rotate, so that when the lithium battery is retracted into the explosion-proof box 5, the two top sealing plates 701 can automatically close the top of the explosion-proof box 5, thereby achieving the purpose of fully isolating the test fuselage 1 from the explosion-proof box 5, and avoiding the problem that when the lithium battery is punctured, if a fire or explosion occurs, the test fuselage 1 will be damaged.

[0065] Please continue to refer to the instruction manual Figure 8-9 , more specifically, in the embodiment of the present invention, a pull rod 704 is installed on the installation shaft 703, and a pull rod 705 is rotatably installed on one side of the pull rod 704 and the lower pull rod 706; two pull shafts 707 are rotatably installed on the pull rod 705, and the two pull shafts 707 are respectively installed on the pull rod 704 and the lower pull rod 706. It should be noted that in the embodiment of the present invention, the movement of the lower pull plate 702 drives the two lower pull rods 706 to move, the movement of the lower pull rod 706 drives the pull rod 705 to move through a pull shaft 707, and the pull rod 705 drives the pull rod 704 to rotate through another pull shaft 707, so that the pull rod 704 drives the installation shaft 703 to rotate, and the rotation of the installation shaft 703 drives the top sealing plate 701 to rotate, so that the two top sealing plates 701 can achieve the sealing of the top side of the explosion-proof box 5.

[0066] like Figure 9-13 As shown, an acupuncture test device for lithium-ion battery safety analysis provided by an embodiment of the present invention, a driven bar 803 is installed on one side of a dispensing box 802, and a push rod 805 is rotatably installed on one side of a loading box 801, and the push rod 805 is movably installed on the driven bar 803;

[0067] In addition, a rotating seat 804 is installed on one side of the loading box 801, and the push rod 805 is rotatably installed on the rotating seat 804. It should be noted that in the embodiment of the present invention, after the lithium battery falls into the explosion-proof box 5, if the lithium battery catches fire or even explodes, the pressing frame 809 is stepped on in time, so that the pressing frame 809 synchronously drives the two lifting frames 806 to move, and the lifting frames 806 move to drive the push rod 805 to rotate through the adapter shaft 807, and the push rod 805 rotates to push the scattering box 802 into the explosion-proof box 5 through the driven bar 803, and at the same time, the scattering box 802 sprinkles sand on the lithium battery to extinguish and insulate the lithium battery, and can cover the liquid flowing out of the lithium battery, which can not only play a good role in preventing the spread of fire, but also effectively extinguish the fire.

[0068] like Figure 9-13 As shown, more specifically, in the embodiment of the present invention, the bottom sides of the two loading boxes 801 are both movably mounted with lifting frames 806, and the two lifting frames 806 are movably mounted on one side of the two ejection rods 805; in addition, the two lifting frames 806 are mounted with a pressing frame 809, and the pressing frame 809 is pressed down to drive the two lifting frames 806 to move at the same time. It should be noted that in the embodiment of the present invention, when the pressing frame 809 is pressed down, the two lifting frames 806 can be driven to move synchronously, and then the two lifting frames 806 can simultaneously drive the two ejection rods 805 to rotate, thereby achieving the purpose of pushing the two dispensing boxes 802 into the explosion-proof box 5 at the same time.

[0069] More specifically, in the embodiment of the present invention, two torsion shafts 810 are installed on the ejection rod 805, one torsion shaft 810 is movably installed on the driven bar 803, a torsion groove 811 is provided on the rotating seat 804, and the other torsion shaft 810 is rotatably installed in the torsion groove 811; in addition, a movable hole 808 is provided on the ejection rod 805, and a transfer shaft 807 is rotatably installed on the lifting frame 806, and the transfer shaft 807 is movably installed in the movable hole 808;

[0070] In addition, a torsion spring 812 is installed in the torsion groove 811, and the other end of the torsion spring 812 is installed on the torsion shaft 810. It should be noted that in the embodiment of the present invention, when the stepping frame 809 is stepped on to synchronously drive the two lifting frames 806 to move, the lifting frames 806 move and drive the push rod 805 to rotate through the transfer shaft 807, and the transfer shaft 807 slides in the movable hole 808, and the push rod 805 rotates through a torsion shaft 810 to drive the driven bar 803 to move, and the torsion shaft 810 slides in the driven bar 803, so that the driven bar 803 pushes the dispensing box 802 into the explosion-proof box 5, and the push rod 805 rotates through another torsion shaft 810 to rotate in the torsion groove 811, and drives the torsion spring 812 to bear force, so that the resilience of the torsion spring 812 can help the push rod 805 to reset, so that the dispensing box 802 can be easily reset.

[0071] In summary, the working principle of the needle penetration test equipment for lithium-ion battery safety analysis provided by the embodiment of the present invention is:

[0072] When conducting a puncture test on a lithium battery, the lithium battery is mounted on the fixture 2, and then the mounting seat 602 is driven to move by the telescopic column 3, so that the mounting seat 602 drives the puncture needle 4 to penetrate the lithium battery. After penetrating to a certain depth, the mounting seat 602 moves to drive the card plate 605 to move downward, and the card plate 605 moves to simultaneously drive the two push-pull frames 607 and the extrusion frame 615 to move downward, and the push-pull frame 607 moves vertically downward in the lifting slot 610, and the telescopic column 3 continues to move downward, so that the card plate 605 drives the extrusion frame 615 to move downward continuously, and the extrusion frame 615 moves to drive the extrusion wheel 616 to contact the wedge block 617, so that the wedge block 617 squeezes the extrusion wheel 616, thereby driving the extrusion frame 615 to move horizontally, and the extrusion frame 615 drives the card plate 605 to move horizontally, and the card plate 605 passes through the two push-pull frames 60 7 drives the two sliding plates 609 to move horizontally, and the sliding plates 609 move horizontally in the sliding grooves 608, and compress the extrusion springs 614, so that the card plate 605 is separated from the socket 604, and at the same time, the sliding plate 609 moves to drive the locking frame 612 to separate from the locking grooves 613. At this time, under the gravity of the lithium battery, the retractable base 601 moves downward, and the retractable base 601 moves vertically downward in the explosion-proof box 5 through the lifting plate 618, so that the retractable base 601 drives the lithium battery to move into the explosion-proof box 5 through the clamp 2, and the lithium battery simultaneously drives the puncture needle 4 to move into the explosion-proof box 5. At this time, the lithium battery is observed in the explosion-proof box 5, which can effectively avoid accidents when the lithium battery is punctured, causing the equipment in the test fuselage 1 to be damaged, thereby ensuring the safe use of the test fuselage 1;

[0073] Furthermore, when the retracting base 601 is retracted into the explosion-proof box 5, it falls on the pull-down plate 702, so that the pull-down plate 702 is forced to move downward, and the pull-down plate 702 slides vertically in the explosion-proof box 5. At the same time, the movement of the pull-down plate 702 drives the two pull-down rods 706 to move, and the movement of the pull-down rod 706 drives the pull rod 705 to move through a pulling shaft 707, and the pulling rod 705 drives the pull rod 704 to rotate through another pulling shaft 707, so that the pull rod 704 drives the installation shaft 703 to rotate, and the rotation of the installation shaft 703 drives the top sealing plate 701 to rotate, so that the two top sealing plates 701 can seal the top side of the explosion-proof box 5, and then when the lithium battery is retracted into the explosion-proof box 5, the two top sealing plates 701 can automatically seal the top of the explosion-proof box 5, thereby achieving the purpose of fully isolating the test fuselage 1 from the explosion-proof box 5, and avoiding the problem that the test fuselage 1 will be damaged if a fire or explosion occurs when the lithium battery is punctured;

[0074] Furthermore, after the lithium battery falls into the explosion-proof box 5, if the lithium battery catches fire or even explodes, the pressing frame 809 is stepped on in time, so that the pressing frame 809 drives the two lifting frames 806 to move synchronously, and the lifting frames 806 move to drive the ejection rod 805 to rotate through the adapter shaft 807, and the adapter shaft 807 slides in the movable hole 808, and the ejection rod 805 rotates to drive the driven bar 803 to move through a torsion shaft 810, and the torsion shaft 810 slides in the driven bar 803, so that the driven bar 803 The scattering box 802 is pushed into the explosion-proof box 5, and the scattering box 802 sprinkles sand on the lithium battery to extinguish and insulate the lithium battery, and can cover the liquid flowing out of the lithium battery, which can not only play a good role in preventing the spread of fire, but also effectively extinguish the fire; at the same time, the push rod 805 rotates through another torsion shaft 810 in the torsion groove 811, and drives the torsion spring 812 to be stressed, so the resilience of the torsion spring 812 can help the push rod 805 to reset, thereby making it easier for the scattering box 802 to reset.

[0075] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A needle penetration test device for lithium-ion battery safety analysis, characterized in that: It comprises a test body, in which a fixture and a telescopic column are installed, a puncture needle is installed on the bottom side of the telescopic column, and a box door is installed on the test body; An explosion-proof box is movably installed on the bottom side of the test fuselage, an observation window is installed on the explosion-proof box, an active separation device is installed in the explosion-proof box, and the active separation device is used to separate the clamp and the puncture needle from the test fuselage; the active separation device includes a retractable base and a mounting seat, the retractable base is movably installed in the explosion-proof box, the clamp is installed on the retractable base, the retractable base is moved downward to retract the clamp into the explosion-proof box, the mounting seat is installed on the bottom side of the telescopic column, the puncture needle is plugged into the mounting seat, and a clamping plate is movably installed on the bottom side of the mounting seat, and the clamping plate is used to clamp the puncture needle on the mounting seat; It also includes a top closing device, which is rotatably mounted in the explosion-proof box and is used to close the top side of the explosion-proof box; the top closing device includes two top sealing plates, which are rotatably mounted on the inner walls of both sides of the explosion-proof box, and the top sides of the two top sealing plates are in contact with the bottom side of the test fuselage, and the two top sealing plates are rotatably used to close the top side of the explosion-proof box; It also includes a covering fire extinguishing device, which is installed on both sides of the explosion-proof box, and is used to cover and extinguish the test batteries in the explosion-proof box; the covering fire extinguishing device includes two loading boxes, both sides of the explosion-proof box are opened, and the two loading boxes are connected to the explosion-proof box. A spreading box is movably installed in the loading box, and the spreading box is filled with sand. The spreading box extends into the explosion-proof box and is used to sprinkle sand on the test batteries in the explosion-proof box.

2. A needle penetration test device for lithium ion battery safety analysis according to claim 1, characterized in that: The active separation device further comprises two sliding plates, the sliding plates are slidably mounted on the inner wall of the bottom side of the test fuselage, and push-pull frames are mounted on both sides of the clamping plate, and the two push-pull frames are slidably mounted on the two sliding plates respectively; The sliding plate is provided with a lifting slot, and the push-pull frame is slidably installed in the lifting slot.

3. A needle penetration test device for lithium ion battery safety analysis according to claim 2, characterized in that: Two sliding grooves are provided on the inner wall of the bottom side of the test fuselage, and the two sliding plates are slidably installed in the two sliding grooves respectively; A pressing spring is installed on the inner wall of the sliding groove, and the other end of the pressing spring is installed on one side of the sliding plate.

4. A needle penetration test device for lithium ion battery safety analysis according to claim 3, characterized in that: An extrusion frame is installed on one side of the cardboard, and an extrusion wheel is rotatably installed on the extrusion frame. An adapting groove is opened on one side of the cardboard, and the puncture needle passes through the adapting groove. A slot is opened on the bottom side of the mounting seat, and a socket is inserted in the slot. The puncture needle is installed on the bottom side of the socket; A wedge block is movably mounted on an inner wall of one side of the test body through bolts, and the wedge block is used to squeeze the squeezing wheel, and drive the clamping plate to separate from the puncture needle through the squeezing frame.

5. A needle penetration test device for lithium ion battery safety analysis according to claim 4, characterized in that: Two connecting seats are installed on the top side of the retractable base, and a locking groove is provided on one side of the two connecting seats. A locking frame is installed on the side of the two sliding plates close to each other, and the two locking frames are respectively inserted into the two locking grooves; A lifting plate is installed on the bottom side of the retractable base, and the lifting plate is slidably installed on the inner walls on both sides of the explosion-proof box.

6. The needle penetration test equipment for lithium ion battery safety analysis according to claim 1, characterized in that: The top closing device also includes a pull-down plate, which is movably mounted on the inner walls on both sides of the explosion-proof box; Two pull-down rods are installed on the top side of the pull-down plate, two mounting shafts are rotatably installed in the explosion-proof box, the two top sealing plates are respectively installed on the two mounting shafts, and the two pull-down rods are respectively connected to the two mounting shafts.

7. A needle penetration test device for lithium ion battery safety analysis according to claim 6, characterized in that: A pull rod is installed on the installation shaft, and a pull rod is rotatably installed on one side of the pull rod and the lower pull rod; Two pulling shafts are rotatably mounted on the pulling rod, and the two pulling shafts are respectively mounted on the pulling rod and the lower pulling rod.

8. The needle penetration test equipment for lithium ion battery safety analysis according to claim 1, characterized in that: A driven bar is installed on one side of the dispensing box, and a push-out rod is rotatably installed on one side of the loading box, and the push-out rod is movably installed on the driven bar; A rotating seat is installed on one side of the loading box, and the ejection rod is rotatably installed on the rotating seat.

9. A needle penetration test device for lithium ion battery safety analysis according to claim 8, characterized in that: A lifting frame is movably mounted on the bottom side of the two loading boxes, and the two lifting frames are movably mounted on one side of the two ejection rods respectively; A pressing frame is installed on the two lifting frames, and stepping on the pressing frame drives the two lifting frames to move at the same time.

10. A needle penetration test device for lithium ion battery safety analysis according to claim 9, characterized in that: Two torsion shafts are installed on the ejection rod, one of the torsion shafts is movably installed on the driven bar, a torsion groove is provided on the rotating seat, and the other torsion shaft is rotatably installed in the torsion groove; A movable hole is provided on the ejection rod, a transfer shaft is rotatably mounted on the lifting frame, and the transfer shaft is movably mounted in the movable hole; A torsion spring is installed in the torsion groove, and the other end of the torsion spring is installed on the torsion shaft.

Images