A power lithium battery pack extrusion test device

Abstract

The invention relates to the technical field of lithium battery extrusion experiment, and in particular to an extrusion test device for a power lithium battery pack; after the battery is installed, a driving electric cylinder is started, and an electric cylinder telescopic rod on the driving electric cylinder pushes an extrusion mounting seat, and the extrusion mounting seat synchronously drives an extrusion push plate and a pressure sensor to move, so that the extrusion mounting seat and the extrusion push plate pass through a moving groove and enter an explosion-proof inner box, and then move toward the battery mounting seat in the explosion-proof inner box until a puncture needle installed on the extrusion push plate contacts a battery to be tested, and the battery is extruded by a puncture needle, and a pressure sensor between the extrusion push plate and the extrusion mounting seat records the pressure data applied by the puncture needle to the battery, and the pressure data is transmitted to a display screen on a detection body, thereby realizing an extrusion test on the battery.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery extrusion experiments, in particular to an extrusion test device for a power lithium battery pack. Background Art

[0002] ‌During driving, the car may be collided and squeezed at any time due to driving skills and the car itself, which may cause the frame to deform. The collision and deformation of the car frame will squeeze the car power battery at the same time, causing leakage and short circuit, which may cause thermal runaway. When out of control, the battery will generate high temperature and a large amount of harmful gases, which may cause fire or even explosion in severe cases. With the increasing demand for energy storage batteries and power batteries at home and abroad, especially the vigorous development of electric vehicles, lithium power batteries are an indispensable power supply component for electric vehicles.

[0003] Battery squeeze test is an important safety performance test method, which aims to evaluate the safety performance of batteries when subjected to external force squeeze.

[0004] Through this test, researchers can obtain the amount of deformation that the battery can withstand; the effect of battery deformation on the battery charge; the effect of impact speed and impact mode on battery short circuit; the relationship between deformation and fracture heat generation, accumulated thermal runaway, and fire; therefore, battery pack compression testing is of great significance for ensuring the safety and stability of the battery.

[0005] In order to test the battery, a battery squeezing device has been developed on the market. It uses a needle to puncture and squeeze the battery to obtain the battery performance data.

[0006] However, most of the above-mentioned battery squeezing equipment on the market are single-cell equipment, with relatively small detection specifications and poor safety protection. During use, when the battery squeezing puncture equipment squeezes the battery, the battery will be compressed and offset, resulting in low detection accuracy. These problems may lead to inaccurate test results or even damage the equipment.

[0007] In summary, in order to solve the technical problem raised in this article, the present invention proposes a power lithium battery pack extrusion test device. Summary of the invention

[0008] The present invention proposes a power lithium battery pack extrusion test device, which includes a detection body, a bottom bracket mounting seat, a servo motor, a driving electric cylinder, and a mechanism fixing mounting plate are arranged on one side of the detection body; the bottom bracket mounting seat is arranged inside the detection body; the servo motor and the driving electric cylinder are installed on the bottom bracket mounting seat; the mechanism fixing mounting plate is arranged on the cylinder body of the driving electric cylinder, and is used to fix the driving electric cylinder, and an electric cylinder telescopic rod is arranged inside the driving electric cylinder; the characteristics are:

[0009] An extrusion mounting seat, the extrusion mounting seat is arranged at one end of the electric cylinder telescopic rod away from the driving electric cylinder, an extrusion push plate is arranged on the extrusion mounting seat, and a pressure sensor is arranged between the extrusion push plate and the extrusion mounting seat; an acupuncture mounting seat is arranged at one end of the extrusion mounting seat away from the driving electric cylinder, and a puncture needle is arranged on the acupuncture mounting seat;

[0010] An explosion-proof inner box, which is arranged inside the end of the detection body away from the bottom bracket mounting seat, and a moving groove is provided at the end of the explosion-proof inner box close to the driving electric cylinder, and the size of the moving groove is the same as the size of the extrusion push plate; the extrusion push plate slides inside the moving groove through the driving electric cylinder; an explosion-proof box door is provided on the explosion-proof inner box, and an observation window is provided on the explosion-proof box door;

[0011] An extruded load-bearing plate, the extruded load-bearing plate being arranged inside one end of the explosion-proof inner box away from the bottom bracket mounting seat;

[0012] A battery mounting seat is arranged on the extruded load-bearing plate; the battery mounting seat is used for mounting the battery.

[0013] As a preferred solution of the present application; the battery mounting seat comprises:

[0014] A mounting plate, the mounting plate is arranged on the extruded load-bearing plate, and two sets of sliding grooves are evenly opened at one end of the mounting plate away from the extruded load-bearing plate, and each set of sliding grooves is composed of a plurality of sliding grooves distributed up and down;

[0015] An adjusting plate, wherein the number of the adjusting plates is two, and the two adjusting plates are symmetrically arranged on the mounting plate, and a plurality of sliders are arranged at one end of each adjusting plate close to the mounting plate, and the sliders on each adjusting plate are slidably connected in the corresponding slide groove; a driving block is arranged at the upper end of each adjusting plate, and a bidirectional threaded rod is arranged on the extrusion load-bearing plate, and the bidirectional threaded rod passes through the two driving blocks, and the two driving blocks are threadedly connected to the two sides of the bidirectional threaded rod; a placing plate is arranged at the lower end of the mounting plate, and the placing plate is located below the two adjusting plates;

[0016] An elastic sheet is arranged in the slide groove inside each group of slide grooves, and the elastic sheet is slidably connected to one end of the slide groove close to the middle of the mounting plate. A limiting groove is arranged on each slider, and the limiting groove on each slider extends to the adjustment plate. When the two adjustment plates approach each other, the end of the elastic sheet close to the adjustment plate contacts the groove wall of the limiting groove.

[0017] As a preferred solution of the present application, one end of each elastic sheet close to the adjustment plate is arc-shaped and warped, and there is a gap between the arc-shaped warped end of the elastic sheet and the inner wall of the slide groove.

[0018] As a preferred solution of the present application; there is a gap between each of the sliders and the inner wall of the slide groove, and the size of the gap between the slider and the inner wall of the slide groove is the same as the thickness of the elastic sheet;

[0019] The mounting plate is provided with an adjustment groove at one end close to the extrusion load-bearing plate, the adjustment groove and the slide groove are perpendicular to each other, and the adjustment groove and the slide groove are connected; an adjustment rod is provided inside the adjustment groove, the adjustment rod is in contact with the elastic sheet inside the slide groove, a plurality of grooves are evenly provided on the adjustment rod, the number of the grooves is the same as the number of the elastic sheets, an arc-shaped protrusion is slidably connected inside the groove through a spring, and in the initial state, the arc-shaped protrusion is located above the elastic sheet, and the upper ends of the two adjustment rods are connected by a connecting rod.

[0020] As a preferred solution of the present application; a tool mounting seat is provided on the extrusion push plate, an extrusion tool is provided on the tool mounting seat, the extrusion tool is arranged in a ring shape, the acupuncture mounting seat is located between the extrusion tool and the extrusion push plate, the acupuncture needle penetrates the extrusion tool and is slidably connected to the penetration point of the extrusion tool, and the middle part of the acupuncture needle is located in the extrusion tool.

[0021] As a preferred solution of the present application, each of the adjustment plates is hinged with a hinged plate at one end away from the extrusion load-bearing plate. In the initial state, the two hinged plates are inclined toward the middle of the mounting plate, and a strip groove is opened in the middle of the two hinged plates.

[0022] As a preferred solution of the present application, the hinged plate is made of elastic steel plate.

[0023] As a preferred solution of the present application, a plurality of mounting holes are arranged on the hinge plate, mounting posts are slidably connected inside the mounting holes, and an elastic belt is arranged between the mounting posts and the hinge plate.

[0024] As a preferred solution of the present application; an explosion vent is provided on the upper inner wall of the explosion-proof inner box, a splash-proof grid is arranged in the explosion vent, a smoke sensor and a gas fire extinguishing nozzle are arranged on the upper inner wall of the explosion-proof inner box, the smoke sensor and the gas fire extinguishing nozzle are located directly above the battery mounting seat, and the gas fire extinguishing nozzle is connected to a fire extinguishing gas tank arranged inside the detection body through a pipe; a smoke exhaust duct is arranged on the upper end of the explosion-proof inner box, the smoke exhaust duct is connected to the explosion-proof inner box through the explosion vent, and a smoke exhaust fan is arranged inside the smoke exhaust duct.

[0025] The beneficial effects of the present invention are as follows:

[0026] After the battery is installed, the driving electric cylinder is started, and the electric cylinder telescopic rod on the driving electric cylinder pushes the extrusion mounting seat. The extrusion mounting seat simultaneously drives the extrusion push plate and the pressure sensor to move, so that the extrusion mounting seat and the extrusion push plate pass through the moving groove and enter the explosion-proof inner box, and then move toward the battery mounting seat in the explosion-proof inner box until the puncture needle installed on the extrusion push plate contacts the battery to be tested, and the battery is extruded and punctured by the puncture needle. The pressure sensor between the extrusion push plate and the extrusion mounting seat records the pressure data applied by the puncture on the battery, and the pressure data is transmitted to the display screen on the detection body, thereby realizing the extrusion test of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a stereogram in the present invention;

[0028] Figure 2 It is a three-dimensional diagram of an explosion-proof door opened in the present invention;

[0029] Figure 3 yes Figure 1 Half-section view in

[0030] Figure 4 This is a view of the internal structure of the detection instrument body of the present invention;

[0031] Figure 5 It is a structural view of the smoke sensor and the gas fire extinguishing nozzle in the present invention;

[0032] Figure 6 It is a half-section view of the explosion-proof inner box of the present invention;

[0033] Figure 7 It is a structural view of the driving electric cylinder in the present invention;

[0034] Figure 8 It is a structural view of the battery mounting base of the present invention;

[0035] Fig. 9 is a partial cross-sectional view of the mounting plate of the present invention;

[0036] Fig.10 It is a structural view of the adjusting rod in the present invention;

[0037] Fig.11 yes Fig.10 A partial enlarged view of point A in the figure.

[0038] In the figure: bottom bracket mounting seat 1, driving electric cylinder 11, mechanism fixing mounting plate 12, electric cylinder telescopic rod 13, extrusion mounting seat 14, extrusion push plate 15, tool mounting seat 151, extrusion tool 152, pressure sensor 16, puncture needle 17, explosion-proof inner box 18, moving groove 181, explosion-proof box door 182, explosion vent 183, anti-splash grid 184, smoke sensor 185, gas fire extinguishing nozzle 186, fire extinguishing gas tank 187, Smoke exhaust duct 188, smoke exhaust fan 189, extrusion load-bearing plate 19, battery mounting seat 2, mounting plate 21, slide groove 22, elastic sheet 221, adjustment plate 23, slider 24, limit groove 241, drive block 231, bidirectional threaded rod 25, placement plate 26, adjustment groove 27, adjustment rod 271, groove 272, arc-shaped protrusion 273, connecting rod 274, hinged plate 28, mounting hole 29, mounting column 291, elastic belt 292. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] Embodiment 1:

[0041] like Figures 1 to 11 As shown; a power lithium battery pack extrusion test device, the battery pack extrusion test device comprises a detection body, a bottom bracket mounting seat 1, a servo motor, a driving electric cylinder 11, and a mechanism fixing mounting plate 12 are arranged on one side of the detection body; the bottom bracket mounting seat 1 is arranged inside the detection body; the servo motor and the driving electric cylinder 11 are installed on the bottom bracket mounting seat 1; the mechanism fixing mounting plate 12 is arranged on the cylinder body of the driving electric cylinder 11, and is used to fix the driving electric cylinder 11, and an electric cylinder telescopic rod 13 is arranged inside the driving electric cylinder 11;

[0042] An extrusion mounting seat 14 is arranged at one end of the electric cylinder telescopic rod 13 away from the driving electric cylinder 11, an extrusion push plate 15 is arranged on the extrusion mounting seat 14, and a pressure sensor 16 is arranged between the extrusion push plate 15 and the extrusion mounting seat 14; an acupuncture mounting seat is arranged at one end of the extrusion mounting seat 14 away from the driving electric cylinder 11, and a puncture needle 17 is arranged on the acupuncture mounting seat;

[0043] An explosion-proof inner box 18 is arranged inside the end of the detection body away from the bottom bracket mounting seat 1. A moving groove 181 is opened at the end of the explosion-proof inner box 18 close to the driving electric cylinder 11. The size of the moving groove 181 is the same as that of the extrusion push plate 15. The extrusion push plate 15 slides inside the moving groove 181 through the driving electric cylinder 11. An explosion-proof box door 182 is provided on the explosion-proof inner box 18, and an observation window is provided on the explosion-proof box door 182.

[0044] An extrusion load-bearing plate 19, wherein the extrusion load-bearing plate 19 is arranged inside one end of the explosion-proof inner box 18 away from the bottom bracket mounting seat 1;

[0045] A battery mounting seat 2, which is arranged on the extruded load-bearing plate 19; the battery mounting seat 2 is used for mounting the battery;

[0046] The battery mount 2 includes:

[0047] The mounting plate 21 is arranged on the extrusion bearing plate 19, and two groups of sliding grooves are evenly opened at one end of the mounting plate 21 away from the extrusion bearing plate 19, and each group of sliding grooves is composed of a plurality of sliding grooves 22 distributed up and down;

[0048] The number of the adjusting plates 23 is two, and the two adjusting plates 23 are symmetrically arranged on the mounting plate 21, and each adjusting plate 23 is provided with a plurality of sliders 24 at one end close to the mounting plate 21, and the sliders 24 on each adjusting plate 23 are slidably connected to the corresponding slide groove 22; a driving block 231 is provided at the upper end of each adjusting plate 23, and a bidirectional threaded rod 25 is provided on the extrusion bearing plate 19, and the bidirectional threaded rod 25 passes through the two driving blocks 231 and is threadedly connected to the two driving blocks 231; a placing plate 26 is provided at the lower end of the mounting plate 21, and the placing plate 26 is located below the two adjusting plates 23;

[0049] An elastic sheet 221 is provided in the slide groove 22 inside each group of slide grooves. The elastic sheet 221 is slidably connected to one end of the slide groove 22 close to the middle of the mounting plate 21. A limiting groove 241 is provided on each slider 24, and the limiting groove 241 on each slider 24 extends to the adjustment plate 23. When the two adjustment plates 23 are close to each other, one end of the elastic sheet 221 close to the adjustment plate 23 contacts the groove wall of the limiting groove 241.

[0050] One end of each elastic piece 221 close to the adjustment plate 23 is raised in an arc shape, and there is a gap between the raised end of the elastic piece 221 and the inner wall of the slide slot 22 .

[0051] The specific workflow is as follows:

[0052] When the battery is subjected to an extrusion test, the explosion-proof box door 182 on the explosion-proof inner box body 18 is first opened, and then the battery to be tested is installed on the battery mounting seat 2. During the installation process, the staff first rotates the bidirectional threaded rod 25 manually or by motor drive. The present application takes manual operation as an example; first, the bidirectional threaded rod 25 is rotated forward. When the bidirectional threaded rod 25 is rotating forward, since the thread grooves at both ends of the bidirectional threaded rod 25 are in opposite directions, the two driving blocks 231 on the bidirectional threaded rod 25 are rotated in a direction away from each other, and the two driving blocks 231 drive the two adjustment plates 23 to move in a direction away from each other, and the corresponding sliders 24 on the two adjustment plates 23 move away from each other in the slide grooves 22 inside the two sets of slide grooves, so that the gap between the two adjustment plates 23 becomes larger;

[0053] Then the staff puts the battery to be tested on the inverted placement plate 26. After the battery is placed on the inverted placement plate 26, the staff controls the bidirectional threaded rod 25 to reverse, so that the two driving blocks 231 are close to each other on the bidirectional threaded rod 25, and each driving block 231 drives the corresponding adjustment plate 23 to be close to each other until the adjustment plate 23 clamps the side of the battery to be tested; and then the battery to be tested is limited to avoid the battery from being offset during the squeezing process, thereby improving the test accuracy;

[0054] If the battery to be tested is a battery pack, the battery pack is usually square. In this case, due to the plate shape of the adjustment plate 23, the two adjustment plates 23 can limit the two sides of the battery pack and tightly clamp the sides of the battery pack. In addition, the distance between the two adjustment plates 23 can be adjusted according to the size of the battery pack, so that the battery mounting seat 2 can adapt to the installation of battery packs of different sizes.

[0055] If the battery is a single cylindrical battery, since the size of a single cylindrical battery is smaller than the battery pack, the bidirectional threaded rod 25 is controlled to reverse, so that the driving blocks 231 on the bidirectional threaded rod 25 are close to each other, and the two driving blocks 231 drive the two adjustment plates 23 to be close to each other, and the sliders 24 at the ends of the two adjustment plates 23 slide in the corresponding slide grooves 22 until the slider 24 on the adjustment plate 23 contacts the elastic sheet 221 in the slide groove 22. The elastic sheet 221 is an elastic steel sheet. Since the end of the elastic sheet 221 close to the adjustment plate 23 is arc-shaped and tilted, when the adjustment plate 23 slides in the slide groove 22, the arc-shaped end of the elastic sheet 221 will tilt, so that the elastic sheet 221 is inside the limiting groove 241 opened on the slider 24. Slide in the direction away from the mounting plate 21, when the arc-shaped end of the elastic sheet 221 moves to the end of the limiting groove 241 on the adjusting plate 23, the elastic sheet 221 and the adjusting plate 23 are in a triangular state, and then the adjusting plates 23 continue to approach each other. At this time, the elastic sheet 221 cannot slide inside the limiting groove 241, so that the middle part of the elastic sheet 221 is bent, and the elastic sheet 221 is bent into an arc until the two adjusting plates 23 contact the cylindrical battery, and the elastic sheet 221 inside the slide groove 22 is also bent into an arc, so that the elastic sheet 221 can support the arc surface of the cylindrical battery, thereby limiting the cylindrical battery; so that the battery mounting seat 2 can install batteries of different shapes, thereby improving the test effect of different batteries;

[0056] After the battery is installed, the driving electric cylinder 11 is started, and the electric cylinder telescopic rod 13 on the driving electric cylinder 11 pushes the extrusion mounting seat 14, and the extrusion mounting seat 14 synchronously drives the extrusion push plate 15 and the pressure sensor 16 to move, so that the extrusion mounting seat 14 and the extrusion push plate 15 pass through the moving groove 181 and enter the explosion-proof inner box 18, and then move toward the battery mounting seat 2 in the explosion-proof inner box 18 until the puncture needle 17 installed on the extrusion push plate 15 contacts the battery to be tested, and the battery is extruded and punctured by acupuncture, and the pressure sensor 16 between the extrusion push plate 15 and the extrusion mounting seat 14 records the pressure data applied by the acupuncture to the battery, and the pressure data is transmitted to the display screen on the detection body, thereby realizing the extrusion test of the battery.

[0057] Embodiment 2:

[0058] like Figures 3 to 11 As shown; there is a gap between each of the sliders 24 and the inner wall of the slide groove 22, and the size of the gap between the slider 24 and the inner wall of the slide groove 22 is the same as the thickness of the elastic sheet 221;

[0059] An adjusting slot 27 is provided at one end of the mounting plate 21 close to the extrusion load-bearing plate 19. The adjusting slot 27 is perpendicular to the slide slot 22, and the adjusting slot 27 is communicated with the slide slot 22. An adjusting rod 271 is provided inside the adjusting slot 27. The adjusting rod 271 contacts the elastic sheet 221 inside the slide slot 22. A plurality of grooves 272 are evenly provided on the adjusting rod 271. The number of the grooves 272 is the same as the number of the elastic sheets 221. An arc-shaped protrusion 273 is slidably connected inside the groove 272 by a spring. In the initial state, the arc-shaped protrusion 273 is located above the elastic sheet 221. The upper ends of the two adjusting rods 271 are connected by a connecting rod 274.

[0060] The specific workflow is as follows:

[0061] On the basis of the above-mentioned embodiment 1, a gap is provided between each slider 24 and the inner wall of the slide groove 22, and the size of the gap between the slider 24 and the slide groove 22 is the same as the size of the elastic sheet 221; if the battery to be tested is a battery pack, and the size of the battery pack is small, then when the bidirectional threaded rod 25 rotates, the two driving blocks 231 drive the adjustment plates 23 to approach each other, and the slider 24 moves inside the slide groove 22. When the slider 24 moves to the position of the elastic sheet 221, since the size of the gap between the slider 24 and the slide groove 22 is the same as the size of the elastic sheet 221, the elastic sheet 221 will not contact the limiting groove 241 on the slider 24, so that the elastic sheet 221 does not move, and the smaller battery pack to be tested is positioned and clamped;

[0062] If it is necessary to position the cylindrical battery, the staff can press the connecting rod 274. After the connecting rod 274 is pressed, the two adjusting rods 271 will be squeezed, and the two adjusting rods 271 will move downward inside the adjusting groove 27. Since the adjusting groove 27 is provided on the mounting plate 21, and the adjusting groove 27 is perpendicular to the slide groove 22, and the adjusting groove 27 is connected to the slide groove 22; when the adjusting rod 271 moves downward, the groove 272 provided on the adjusting rod 271 and the arc-shaped protrusion 273 provided inside the groove 272 by the spring device move downward synchronously. Since the arc-shaped protrusion 273 is limited by the inner wall of the adjusting groove 27 in the initial state, the arc-shaped protrusion 273 cannot pop out from the inner wall of the groove 272; and when the adjusting rod 271 moves downward, until the groove 272 moves to the connecting point between the adjusting groove 27 and the slide groove 22, the inner wall of the adjusting groove 27 no longer presses the arc-shaped protrusion 27 3 limit, so that the spring inside the groove 272 bounces up the arc-shaped protrusion 273. When the arc-shaped protrusion 273 bounces up, the arc-shaped protrusion 273 will push up the elastic plate. At this time, when the two adjustment plates 23 approach each other, the slider 24 located inside the slide groove 22 will contact the elastic plate, so that the elastic plate will slide on the limiting groove 241 on the slider 24, until the elastic plate moves to the end where the limiting groove 241 is located on the adjustment plate 23, the elastic plate will bend in an arc shape, so that the arc surface of the cylindrical battery is wrapped, thereby improving the positioning and supporting effect of the cylindrical battery and improving the detection accuracy; when positioning the square battery pack, it is only necessary to lift the connecting rod 274 upward, and the adjusting rod 271 drives the arc-shaped protrusion 273 to reset. During the resetting process of the arc-shaped protrusion 273, the adjusting groove 27 presses the arc surface of the arc-shaped protrusion 273, so that the arc-shaped protrusion 273 is collected in the groove 272.

[0063] Embodiment three:

[0064] like Figures 3 to 10 As shown; the extrusion push plate 15 is provided with a tool mounting seat 151, and the tool mounting seat 151 is provided with an extrusion tool 152, and the extrusion tool 152 is arranged in an annular shape, and the acupuncture mounting seat is located between the extrusion tool 152 and the extrusion push plate 15, and the needle 17 penetrates the extrusion tool 152 and is slidably connected with the penetration of the extrusion tool 152, and the middle part of the needle 17 is located in the extrusion tool 152;

[0065] Each of the adjustment plates 23 is hinged with a hinge plate 28 at one end away from the extrusion load-bearing plate 19. In the initial state, the two hinge plates 28 are inclined toward the middle of the mounting plate 21, and a strip groove is opened in the middle of the two hinge plates 28;

[0066] The hinge plate 28 is made of elastic steel plate.

[0067] The specific workflow is as follows:

[0068] A tooling mounting seat 151 is provided on the extrusion push plate 15, and an extrusion tooling 152 is provided on the tooling mounting seat 151. The extrusion tooling 152 is annularly arranged, and the needle 17 penetrates the extrusion tooling 152, and the penetration point between the needle 17 and the extrusion tooling 152 is slidably connected, and the middle part of the needle 17 is located in the extrusion tooling 152. When the driving rod electric cylinder pushes the needle 17 to move in the direction of the battery mounting seat 2 by extrusion, the extrusion mounting seat 14 and the extrusion tooling 152 will move synchronously in the direction of the battery mounting seat 2 until the needle 17 squeezes the battery to be tested. During the squeezing process, since the needle 17 is located in the middle part of the squeezing tooling 152, the squeezing tooling 152 limits the middle part of the needle 17, thereby preventing the needle 17 from being concave on the battery to be tested when squeezing the battery to be tested, resulting in the problem of the extrusion force of the needle puncture being skewed, and the needle 17 being bent.

[0069] The hinged plate 28 is evenly hinged at one end of the adjusting plate 23 away from the extrusion load-bearing plate 19, and in the initial state, the two hinged plates 28 are inclined toward the middle. If a larger battery pack is subjected to a needle puncture test, the battery pack is placed on the placement plate 26, and then the bidirectional threaded rod 25 is rotated. The bidirectional threaded rod 25 drives the two driving blocks 231 to approach each other, and the driving blocks 231 drive the adjusting plates 23 to approach each other. When the adjusting plates 23 approach each other, the end of the hinged plate 28 away from the adjusting plate 23 will first contact the side of the battery pack, and then the adjusting plates 23 continue to approach each other, and the edge of the battery pack will squeeze the hinged plate 28, and the hinged plate 28 will rotate until the hinged plate 28 rotates to a state parallel to the adjusting plate 23, so that the adjusting plate 23 and the hinged plate 28 limit the battery pack together to avoid the battery to be tested from being cheap and improve the detection effect.

[0070] On the basis of the above-mentioned first and second embodiments, after the two adjustment plates 23 and the elastic sheet 221 limit the cylindrical battery, when the electric cylinder 11 is driven to push the electric cylinder telescopic rod 13 to move in the direction of the battery mounting seat 2, the extrusion push plate 15 drives the puncture mounting seat, the puncture needle 17 and the extrusion tooling 152 to move in the direction of the battery to be tested, until the puncture needle 17 squeezes the cylindrical battery to be tested. During the extrusion process, the puncture needle 17 will enter the middle of the battery to be tested, so that the extrusion tooling 152 will squeeze the hinged plates 28 on both sides, so that the hinged plates 28 are tilted and bent toward the middle, which can limit the side of the cylindrical battery, improve the limiting effect of the cylindrical battery, maintain the stability of the battery to be tested, and thus improve the detection effect.

[0071] Embodiment 4:

[0072] like Figures 3 to 11As shown; the hinge plate 28 is provided with a plurality of mounting holes 29, the mounting holes 29 are slidably connected with mounting posts 291, and an elastic belt 292 is provided between the mounting posts 291 and the hinge plate 28.

[0073] The specific workflow is as follows:

[0074] A plurality of mounting holes 29 are provided on the hinge plate 28, and mounting posts 291 are provided inside the mounting holes 29, and an elastic band 292 is provided between the mounting posts 291 and the hinge plate 28, so that when the hinge plate 28 limits the battery pack and the cylindrical battery, the surface roughness of the hinge plate 28 is improved, the friction between the hinge plate 28 and the battery is improved, and the stabilization effect is improved; and if the pressed surface of the battery to be tested appears concave or the like during the extrusion process of the battery to be tested, since there is an elastic band 292 between the mounting post 291 and the hinge plate 28, the elastic band 292 drives the mounting post 291, and the elastic band 292 is detachable and replaceable; one end of the mounting post 291 is extended into the concave place, and the concave place is pushed and limited, so as to further avoid the problem of bias of the battery to be tested during the extrusion test.

[0075] Embodiment five:

[0076] like Figures 4 to 7 As shown; an explosion vent 183 is provided on the upper inner wall of the explosion-proof inner box 18, and a splash-proof grid 184 is arranged in the explosion vent 183; a smoke sensor 185 and a gas fire extinguishing nozzle 186 are arranged on the upper inner wall of the explosion-proof inner box 18, and the smoke sensor 185 and the gas fire extinguishing nozzle 186 are located directly above the battery mounting seat 2, and the gas fire extinguishing nozzle 186 is connected to a fire extinguishing gas tank 187 arranged inside the detection body through a pipeline; a smoke exhaust duct 188 is provided on the upper end of the explosion-proof inner box 18, and the smoke exhaust duct 188 is connected to the explosion-proof inner box 18 through the explosion vent 183, and a smoke exhaust fan 189 is arranged inside the smoke exhaust duct 188.

[0077] The specific workflow is as follows:

[0078] An explosion vent 183 is provided on the upper inner wall of the explosion-proof inner box 18, an anti-splash grid 184 is provided in the explosion vent 183, a smoke sensor 185 and a gas fire extinguishing nozzle 186 are provided on the upper inner wall of the explosion-proof inner box 18, a smoke exhaust duct 188 is provided at the upper end of the explosion-proof inner box 18, the smoke exhaust duct 188 is connected to the interior of the explosion-proof inner box 18, and a smoke exhaust fan 189 is provided inside the smoke exhaust duct 188; during the extrusion test of the battery to be tested, the smoke exhaust fan 189 and the smoke sensor 185 are in a state of working at all times, and if the battery catches fire during the test When there is a problem, the battery will be the first to emit smoke. At this time, the smoke exhaust fan will be working all the time, and the gas in the explosion-proof inner box 18 will be brought out. At this time, the smoke will be sensed by the smoke sensor 185. After the smoke sensor 185 senses the smoke, the gas fire extinguishing nozzle 186 will spray the fire extinguishing gas in the fire extinguishing gas tank 187 to extinguish the fire of the battery under test and prevent fire; thereby improving the installation effect, and by arranging a splash-proof grid 184 on the explosion vent 183, if the battery under test has problems such as explosion, the splash-proof grid 184 will block the fragments to avoid affecting the smoke exhaust fan 189.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention; those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A power lithium battery pack extrusion test device, the battery pack extrusion test device comprising a detection body, wherein a bottom bracket mounting seat (1), a servo motor, a driving electric cylinder (11), and a mechanism fixing mounting plate (12) are arranged on one side of the detection body; the bottom bracket mounting seat (1) is arranged inside the detection body; the servo motor and the driving electric cylinder (11) are mounted on the bottom bracket mounting seat (1); the mechanism fixing mounting plate (12) is arranged on the cylinder body of the driving electric cylinder (11) and is used to fix the driving electric cylinder (11); the driving electric cylinder (11) is provided with an electric cylinder telescopic rod (13); the characteristics are: An extrusion mounting seat (14), the extrusion mounting seat (14) being arranged at one end of the electric cylinder telescopic rod (13) away from the driving electric cylinder (11), an extrusion push plate (15) being arranged on the extrusion mounting seat (14), a pressure sensor (16) being arranged between the extrusion push plate (15) and the extrusion mounting seat (14); an acupuncture mounting seat being arranged at one end of the extrusion mounting seat (14) away from the driving electric cylinder (11), acupuncture mounting seat being arranged with a puncture needle (17); An explosion-proof inner box (18), the explosion-proof inner box (18) being arranged inside one end of the detection body away from the bottom bracket mounting seat (1), and a movable groove (181) being provided at one end of the explosion-proof inner box (18) close to the driving electric cylinder (11), the size of the movable groove (181) being the same as the size of the extrusion push plate (15); the extrusion push plate (15) slides inside the movable groove (181) through the driving electric cylinder (11); an explosion-proof box door (182) being provided on the explosion-proof inner box (18), and an observation window being provided on the explosion-proof box door (182); An extruded load-bearing plate (19), the extruded load-bearing plate (19) being arranged inside an end of the explosion-proof inner box (18) away from the bottom bracket mounting seat (1); A battery mounting seat (2), the battery mounting seat (2) being arranged on the extruded load-bearing plate (19); the battery mounting seat (2) being used for mounting a battery; The battery mounting base (2) comprises: A mounting plate (21), the mounting plate (21) being arranged on the extrusion bearing plate (19), and two groups of sliding grooves being evenly formed at one end of the mounting plate (21) away from the extrusion bearing plate (19), each group of sliding grooves being composed of a plurality of sliding grooves (22) distributed up and down; An adjusting plate (23), wherein the number of the adjusting plates (23) is two, and the two adjusting plates (23) are symmetrically arranged on the mounting plate (21), and each adjusting plate (23) is provided with a plurality of sliders (24) at one end close to the mounting plate (21), and the sliders (24) on each adjusting plate (23) are slidably connected to the inside of the corresponding slide groove (22); a driving block (231) is provided at the upper end of each adjusting plate (23), and a bidirectional threaded rod (25) is provided on the extrusion bearing plate (19), the bidirectional threaded rod (25) passes through the two driving blocks (231), and the two driving blocks (231) are threadedly connected to the two sides of the bidirectional threaded rod (25); a placing plate (26) is provided at the lower end of the mounting plate (21), and the placing plate (26) is located below the two adjusting plates (23); An elastic sheet (221) is provided in the slide groove (22) inside each group of slide grooves, and the elastic sheet (221) is slidably connected to one end of the slide groove (22) close to the middle of the mounting plate (21). A limiting groove (241) is provided on each slider (24), and the limiting groove (241) on each slider (24) extends to the adjustment plate (23). When the two adjustment plates (23) are close to each other, one end of the elastic sheet (221) close to the adjustment plate (23) contacts the groove wall of the limiting groove (241); One end of each elastic sheet (221) close to the adjustment plate (23) is curved and warped, and a gap exists between the curved end of the elastic sheet (221) and the inner wall of the slide groove (22); There is a gap between each of the sliders (24) and the inner wall of the slide groove (22), and the size of the gap between the slider (24) and the inner wall of the slide groove (22) is the same as the thickness of the elastic sheet (221); An adjusting groove (27) is provided at one end of the mounting plate (21) close to the extrusion bearing plate (19), the adjusting groove (27) and the slide groove (22) are perpendicular to each other, and the adjusting groove (27) and the slide groove (22) are communicated; an adjusting rod (271) is provided inside the adjusting groove (27), the adjusting rod (271) contacts the elastic sheet (221) inside the slide groove (22), a plurality of grooves (272) are evenly provided on the adjusting rod (271), the number of the grooves (272) is the same as the number of the elastic sheets (221), an arc-shaped protrusion (273) is slidably connected inside the groove (272) through a spring, and in an initial state, the arc-shaped protrusion (273) is located above the elastic sheet (221), and the upper ends of the two adjusting rods (271) are connected by a connecting rod (274) provided.

2. A power lithium battery pack extrusion test device as claimed in claim 1, characterized in that: The extrusion push plate (15) is provided with a tool mounting seat (151), and an extrusion tool (152) is provided on the tool mounting seat (151). The extrusion tool (152) is arranged in an annular shape. The acupuncture mounting seat is located between the extrusion tool (152) and the extrusion push plate (15). The acupuncture needle (17) penetrates the extrusion tool (152) and is slidably connected to the penetration point of the extrusion tool (152). The middle part of the acupuncture needle (17) is located in the extrusion tool (152).

3. A power lithium battery pack extrusion test device as claimed in claim 1, characterized in that: Each of the adjustment plates (23) is hingedly connected to a hinge plate (28) at one end away from the extrusion load-bearing plate (19). In an initial state, the two hinge plates (28) are inclined toward the middle of the mounting plate (21), and a strip groove is provided in the middle of the two hinge plates (28).

4. A power lithium battery pack extrusion test device as claimed in claim 3, characterized in that: The hinge plate (28) is made of elastic steel plate.

5. A power lithium battery pack extrusion test device as claimed in claim 4, characterized in that: The hinge plate (28) is provided with a plurality of mounting holes (29), the mounting holes (29) are slidably connected with mounting posts (291), and an elastic band (292) is provided between the mounting posts (291) and the hinge plate (28).

6. A power lithium battery pack extrusion test device as claimed in claim 1, characterized in that: The upper inner wall of the explosion-proof inner box (18) is provided with an explosion vent (183), and an anti-splash grid (184) is arranged in the explosion vent (183). The upper inner wall of the explosion-proof inner box (18) is provided with a smoke sensor (185) and a gas fire extinguishing nozzle (186), and the smoke sensor (185) and the gas fire extinguishing nozzle (186) are located directly above the battery mounting seat (2), and the gas fire extinguishing nozzle (186) is connected to a fire extinguishing gas tank (187) arranged inside the detection body through a pipeline; the upper end of the explosion-proof inner box (18) is provided with a smoke exhaust pipe (188), and the smoke exhaust pipe (188) is connected to the explosion-proof inner box (18) through the explosion vent (183), and a smoke exhaust fan (189) is arranged inside the smoke exhaust pipe (188).

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