A power lithium battery acupuncture testing machine

Abstract

The invention relates to the technical field of lithium battery needle penetration test, in particular to a power lithium battery needle penetration tester; when a placement rack moves to one end of a slide rail close to a water tank, the placement rack is guided by the downward curvature of the slide rail, and the placement rack tilts downward, so that a battery to be tested is affected by its own gravity, and the battery to be tested slides from the placement rack into the water tank, so that water in the water tank cools down and extinguishes the battery to be tested, and the battery to be tested is directly immersed in water for cooling and extinguishing. Compared with a sprinkler and a fire extinguisher, the battery pack to be tested can be completely immersed in water, and the water can fully contact various parts of the battery pack, quickly take away a large amount of heat, effectively reduce the temperature of the battery pack, fundamentally inhibit the further development of thermal runaway of the battery, prevent continuous combustion, and enable the active substance inside the battery pack to fully react with water, reduce the energy inside the battery, and reduce the possibility of re-ignition.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery acupuncture tests, and specifically to a power lithium battery acupuncture testing machine. Background Art

[0002] With the wide application of lithium batteries in electric vehicles and portable devices, their safety has become an important issue;

[0003] During the use of vehicle power batteries, due to factors such as the road environment during driving or transportation, mechanical loads such as vibration, impact, and stone impact are likely to occur; especially in extreme cases, if the power battery is damaged by strong external force extrusion or puncture by a sharp object, it will cause short circuits, temperature rises, pressure rises, etc. inside the battery, and ultimately lead to safety problems such as thermal runaway of the power battery and fire and explosion. Therefore, the safety detection of power batteries is essential;

[0004] Existing power battery acupuncture and extrusion test devices include vertical ball impact and extrusion testing machines. The structures of these devices are mainly divided into two parts. One is the test part, and the other is the fire extinguishing part; the main reason is that when conducting acupuncture tests on power batteries, when the power battery is subjected to extrusion and impact, the power battery will be extruded and have problems such as body heating and even catching fire; by setting up the fire extinguishing part, if the battery pack sample undergoes thermal runaway and catches fire during the test, the sample battery pack can be cooled and extinguished. Mostly, fire extinguishers and sprinklers are used to extinguish the battery pack. When using fire extinguishers and sprinklers to extinguish the battery pack;

[0005] However, when using a fire extinguisher to cool and extinguish the battery pack, the battery pack catches fire usually due to internal thermal runaway. Although the fire extinguisher can control the fire to a certain extent, it is difficult to penetrate deep into the battery pack and cannot fundamentally reduce the temperature and energy inside the battery. It may not be able to completely extinguish the fire and is prone to reignition;

[0006] When using the sprinkler method, although the water from the sprinkler can continuously act on the surface of the battery pack, the contact area between the water and the battery pack and the cooling effect are relatively limited, and it may not be able to quickly and comprehensively reduce the temperature inside the battery pack.

[0007] In summary, to solve the technical problems proposed in this article, the present invention proposes a power lithium battery acupuncture testing machine. Summary of the Invention

[0008] The present invention proposes a power lithium battery acupuncture testing machine. The acupuncture testing machine includes a machine body and an acupuncture device, and the acupuncture device is arranged inside the machine body; it further includes:

[0009] Slide rails, which are symmetrically arranged on both sides of the upper end of the machine body, and one end of the slide rails is in an arc-shaped downward structure;

[0010] Placement rack, the placement rack is rectangular, with pulleys provided at the lower ends of both sides of the placement rack. The pulleys are slidably connected to the slide rails, and two driving columns are provided on each side of the placement rack; two support frames are symmetrically arranged in the middle of the placement rack;

[0011] Sliding plates, the number of sliding plates is two. The sliding plates are slidably connected inside the placement rack and are symmetrically distributed on both sides of the two support frames;

[0012] Jaw clips, two jaw clips are provided on each sliding plate, and the jaw clips on each sliding plate correspond to each other;

[0013] Chains, two chains are symmetrically distributed at both ends of the machine body, and the chains are driven by a driving motor provided on the machine body; one drag pin is provided on each chain, and each drag pin is located between two driving columns on the same side;

[0014] Water tank, the water tank is provided on one side where the slide rail is of an arc structure, and at the same time the water tank is located at the lower end of the slide rail.

[0015] As a preferred solution of the present application, the jaw clip is of a triangular plate structure, and a limiting plate is provided at one end of each jaw clip close to the support frame; the limiting plate is located at the bending part of the jaw clip and is perpendicular to the support frame.

[0016] As a preferred solution of the present application, a driving groove is opened in the middle of each sliding plate, a double-shaft telescopic rod is fixed in the middle of the driving groove, two sliders are slidably connected inside each driving groove, and the two sliders inside each driving groove are connected to both ends of the double-shaft telescopic rod; and the jaw clip is provided on the slider.

[0017] As a preferred solution of the present application, a plurality of limiting grooves are opened at one end of each sliding plate close to each other; a sliding groove is opened at one end of each jaw clip close to the support frame, a clamping plate is slidably connected inside the sliding groove, and a support plate is provided at one end of the clamping plate away from the limiting groove; a placement groove is opened at one end of each jaw clip close to the support frame, and the size of the placement groove is the same as that of the support plate; a first spring is provided between the support plate and the placement groove.

[0018] As a preferred solution of the present application, an airbag is provided inside the placement groove, and the airbag is of a bellows structure; and the first spring between the support plate and the placement groove is located inside the airbag; a rectangular groove is opened at one end of the support plate close to the support frame, and a rubber bladder is hermetically provided inside the rectangular groove; and the rubber bladder is communicated with the airbag.

[0019] As a preferred solution of the present application, a supplementary block is fixed on the inner side of the angle of the clamping jaw, an embedding groove is provided at one end of the clamping jaw close to the supporting plate, the embedding groove is located between the sliding groove and the limiting plate, the embedding groove extends into the interior of the supplementary block, the interior of the embedding groove is slidably connected with an embedding block, the embedding block is located at the lower part of the embedding groove, a fixed plate is provided at the upper end of the embedding block, and the fixed plate is located at the upper part of the embedding groove; a plurality of adjustment grooves are evenly provided on the fixed plate, and an adjustment plate is slidably connected inside each adjustment groove; a spring 2 is provided between the embedding block and the embedding groove; a through groove is provided at one end of the supplementary block close to the card plate, the through groove is connected to the embedding groove located inside the supplementary plate, and a hinge wheel is rotatably connected inside the through groove; a pull rope is provided at one end of the card plate close to the supplementary block, the other end of the pull rope is fixed to the embedding block through the through groove, and the pull belt is located on the outer side of the hinge wheel.

[0020] As a preferred solution of the present application, an installation groove is provided on the inner wall of the limit plate, and a push plate is slidably connected to the inside of the installation groove. One end of the push plate passes through the inner wall of the installation groove and is located on the outside of the limit plate; strip plates are provided at the upper and lower ends of the push plate located inside the installation groove, and a flexible sheet is provided in the middle of the two strip plates.

[0021] As a preferred solution of the present application, the strip plate is hinged on the push plate, and the flexible sheet is a flexible rubber sheet.

[0022] The beneficial effects of the present invention are as follows:

[0023] When the rack moves to one end of the slide rail close to the water tank, the rack is guided by the downward curved arc of the slide rail and tilts downward, so that the battery to be tested is affected by its own gravity, and the battery to be tested slides from the rack into the water tank, so that the water in the water tank cools down the battery to be tested and extinguishes the fire. Compared with sprinklers and fire extinguishers, the battery pack to be tested can be completely immersed in water for cooling and extinguishing. The water can fully contact all parts of the battery pack, quickly take away a large amount of heat, effectively reduce the temperature of the battery pack, fundamentally inhibit the further development of thermal runaway of the battery, prevent continuous combustion, and enable the active substances inside the battery pack to fully react with water, reduce the energy inside the battery, and reduce the possibility of re-ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional diagram of the test device in the present invention;

[0025] Figure 2 yes Figure 1 Front view of the

[0026] Figure 3 It is a structural view of the driving motor, the slide rail and the chain in the present invention;

[0027] Figure 4It is a structural view of the placement rack, support frame and clamping jaw in the present invention;

[0028] Figure 5 is Figure 4 a partial cross-sectional view of the placement rack in

[0029] Figure 6 a cross-sectional view of the airbag and support plate in the present invention;

[0030] Figure 7 a top-down cross-sectional view of the clamping jaw in the present invention;

[0031] Figure 8 a cross-sectional view of the embedding groove in the present invention;

[0032] Figure 9 a partial structural view of the clamping jaw in the present invention;

[0033] Figure 10 a structural view of the limiting plate in the present invention;

[0034] Figure 11 a structural view of the push plate, strip plate and flexible sheet in the present invention;

[0035] Figure 12 a structural view of the embedding block, adjusting block and adjusting groove in the present invention.

[0036] In the figure: machine body 1, slide rail 11, drive motor 112, placement rack 12, drive column 121, support frame 122, sliding plate 123, drive groove 124, double-axis telescopic rod 125, slider 126, limiting groove 127, chute 128, clamping jaw 13, limiting plate 131, clamping plate 132, support plate 133, placement groove 134, airbag 135, rectangular groove 136, rubber bladder 137, chain 14, dragging pin 141, supplementary block 15, embedding groove 151, embedding block 152, fixing plate 153, adjusting groove 154, adjusting plate 155, through groove 156, hinge wheel 157, pulling rope 158, mounting groove 16, push plate 17, strip plate 171, flexible sheet 18, acupuncture device 2, water tank 3. Detailed implementation manners

[0037] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0038] Embodiment 1:

[0039] As Figures 1 to 11 shown; a power lithium battery acupuncture testing machine, the acupuncture testing machine includes a machine body 1 and an acupuncture device 2, and the acupuncture device 2 is arranged inside the machine body 1; further includes:

[0040] Slide rail 11, the slide rails 11 are symmetrically arranged on both sides of the upper end of the machine body 1, and one end of the slide rail 11 is an arc-shaped downward structure;

[0041] Placement rack 12, the placement rack 12 is rectangular, and pulleys are arranged at the lower ends of both sides of the placement rack 12. The pulleys are slidably connected to the slide rails 11, and two driving columns 121 are arranged on each side of the placement rack 12; Two support frames 122 are symmetrically arranged in the middle of the placement rack 12;

[0042] Sliding plates 123, the number of the sliding plates 123 is two. The sliding plates 123 are slidably connected inside the placement rack 12, and the sliding plates 123 are symmetrically distributed on both sides of the two support frames 122;

[0043] Claw 13, two claws 13 are arranged on each sliding plate 123, and the claws 13 on each sliding plate 123 correspond to each other;

[0044] Chains 14, two chains 14 are symmetrically distributed at both ends of the machine body 1, and the chains 14 are driven by a driving motor 112 arranged on the machine body 1; A drag pin 141 is arranged on each chain 14, and each drag pin 141 is located between two driving columns 121 on the same side;

[0045] Water tank 3, the water tank 3 is arranged on the side where the slide rail 11 is arc-shaped, and at the same time the water tank 3 is located below the slide rail 11;

[0046] The claw 13 is a triangular plate structure, and a limiting plate 131 is arranged at one end of each claw 13 close to the support frame 122; The limiting plate 131 is located at the bending part of the claw 13, and the limiting plate 131 is perpendicular to the support frame 122;

[0047] A driving groove 124 is opened in the middle of each sliding plate 123, a double-shaft telescopic rod 125 is fixed in the middle of the driving groove 124, and two sliders 126 are slidably connected inside each driving groove 124. The two sliders 126 inside each driving groove 124 are connected to both ends of the double-shaft telescopic rod 125; And the claw 13 is arranged on the slider 126.

[0048] The specific working process is as follows:

[0049] When in use, the staff can first place the battery pack to be tested on the support frame 122, and then control the sliding plate 123 to slide inside the placement frame 12. The sliding method of the sliding plate 123 inside the placement frame 12 is the method of the existing electric slide rail 11, so that after the battery pack to be tested is placed on the support frame 122, the staff controls the two sliding plates 123 to move toward the middle, and the two sliding plates 123 move toward the direction of the support frame 122 until the claws 13 on the two sliding plates 123 squeeze and clamp the sides of the battery pack; then the staff can The acupuncture device 2 is controlled to work. The acupuncture device 2 is arranged inside the machine body 1. When the battery pack to be tested is installed, the acupuncture device 2 is located below the battery pack to be tested. The acupuncture device 2 is a prior art acupuncture test machine. When the acupuncture device 2 is started, the needles on the acupuncture device 2 are pierced upward from the bottom of the battery pack to be tested, so that the needles on the acupuncture device 2 perform a puncture test on the battery pack to be tested. During the process of puncturing the battery pack to be tested, the staff records the data of the battery pack to be tested during the puncture process to obtain complete extrusion and puncture data;

[0050] If during the process of acupuncture of the battery pack to be tested, the temperature of the battery pack to be tested rises abnormally or the battery pack to be tested shows signs of smoke and fire after being punctured; at this time, the drive motor 112 arranged on the body 1 starts, and the drive motor 112 is a dual-axis motor. After the drive motor 112 is started, the drive motor 112 drives the chains 14 on both sides of the body 1, and the chains 14 on both sides of the body 1 rotate synchronously. During the rotation, the drag pin 141 on the chain 14 works. When the drag pin 141 is working, the drag pin will drive the drive columns 121 placed on both sides. Since the drag pin 141 on each chain 14 is located between the two drive columns 121 on the same side, when the drag pin 141 moves toward the direction of the water tank 3, the drag pin 141 will drive the placement rack 12 to move toward the direction of the water tank 3, and when the placement rack 12 During the movement, the sliding plate 123 gradually slides to both sides, and no longer tightly limits the battery to be tested, so that when the placement rack 12 moves to one end of the slide rail 11 close to the water tank 3, the placement rack 12 is guided by the downward arc of the slide rail 11, and the placement rack 12 tilts downward, so that the battery to be tested is affected by its own gravity, and the battery to be tested slides from the placement rack 12 into the water tank 3, so that the water in the water tank 3 cools down the battery to be tested and extinguishes the fire. In addition, by directly immersing the battery to be tested in water for cooling and extinguishing the fire, compared with sprinklers and fire extinguishers, the battery pack to be tested can be completely immersed in water, and the water can fully contact all parts of the battery pack, quickly take away a large amount of heat, effectively reduce the temperature of the battery pack, fundamentally inhibit the further development of thermal runaway of the battery, prevent continuous combustion, and enable the active substances inside the battery pack to fully interact with water, reduce the energy inside the battery, and reduce the possibility of re-ignition;

[0051] And when the battery pack to be tested enters the water tank 3, at this time, the drive motor 112 rotates in reverse, so that the chain 14 drives the dragging pin 141 to move towards the end far away from the water tank 3. When the dragging pin 141 pushes the driving column 121 at the end far away from the water tank 3, the dragging pin 141 drives the placement rack 12 to slide towards the end far away from the water tank 3 through the driving column 121, so that the placement rack 12 is reset;

[0052] And when the sliding plate 123 moves, when the clamping jaws 13 on the sliding plate 123 limit the side surface of the battery pack to be tested, the clamping jaws 13 are triangular in shape, and a limiting plate 131 is arranged at the folding angle of the clamping jaws 13. The limiting plate 131 is perpendicular to the support frame 122. When the clamping jaws 13 limit the battery pack to be tested, the ends of the four clamping jaws 13 close to the support frame 122 limit the two sides of the battery pack to be tested, and a right-angle included angle is formed between the limiting plate 131 and the clamping end of the clamping jaws 13, so that the four included angles of the battery pack to be tested are located at the right angles between the limiting plate 131 and the clamping end of the clamping jaws 13, thereby limiting all four surfaces of the battery pack to be tested, and improving the stability of the battery pack to be tested on the placement rack 12 when being impacted and pricked by the pricking device 2 from below; And by opening a driving groove 124 in the middle of the sliding plate 123, arranging a double-shaft telescopic rod 125 in the middle of the driving groove 124, and slidably connecting two sliders 126 in the driving groove 124, and the two sliders 126 are distributed at both ends of the double-shaft telescopic rod 125, and the two sliders 126 are respectively connected to both ends of the double-shaft telescopic rod 125, so that when limiting and clamping the battery pack to be tested, the double-shaft telescopic rod 125 can extend towards both ends, or the double-shaft telescopic rod 125 can contract towards the middle, so that the double-shaft telescopic rod 125 can adjust the gap between the two sliders 126 on the same sliding plate 123. Since the clamping jaws 13 are respectively arranged on the corresponding sliders 126, the gap between the two clamping jaws 13 on the same sliding plate 123 is adjusted, so that when testing the battery pack to be tested, battery packs to be tested with different sizes can be limited, thereby improving the test efficiency.

[0053] Embodiment 2:

[0054] As Figures 1 to 12 shown; A plurality of limiting grooves 127 are opened at one end of each sliding plate 123 close to each other; A sliding groove 128 is opened at one end of each clamping jaw 13 close to the support frame 122, a clamping plate 132 is slidably connected inside the sliding groove 128, and a support plate 133 is arranged at one end of the clamping plate 132 far away from the limiting groove 127; A placement groove 134 is opened at one end of the clamping jaw 13 close to the support frame 122, and the size of the placement groove 134 is the same as that of the support plate 133; A first spring is arranged between the support plate 133 and the placement groove 134;

[0055] An airbag 135 is arranged inside the placement groove 134, and the airbag 135 is of a bellows structure; and the first spring between the support plate 133 and the placement groove 134 is located inside the airbag 135; a rectangular groove 136 is opened at one end of the support plate 133 close to the support frame 122, and a rubber bladder 137 is hermetically arranged inside the rectangular groove 136; and the rubber bladder 137 is communicated with the airbag 135.

[0056] The specific working process is as follows:

[0057] On the basis of the above-mentioned embodiment, a plurality of limiting grooves 127 are opened at one end of each sliding plate 123 close to each other, and a sliding groove 128 is opened at one end of each clamping jaw 13 close to the support frame 122, and a clamping plate 132 is slidably connected inside the sliding groove 128. One end of the clamping plate 132 away from the limiting groove 127 is provided with a support plate 133, and a placement groove 134 is opened at one end of the clamping jaw 13 close to the support frame 122. The size of the placement groove 134 is the same as the size of the support plate 133, so that the support plate 133 can be embedded into the placement groove 134 during the movement process, and a first spring is arranged between the placement groove 134 and the support plate 133;

[0058] When the clamping plate 132 is not embedded inside the limiting groove 127, the first spring between the placement groove 134 and the support plate 133 is in a relaxed state; after the battery to be tested is installed on the support frame 122, at this time, the staff controls the two sliding plates 123 to move towards the middle, and the clamping jaws 13 on each sliding plate 123 move towards the middle synchronously. During this process, the support plate 133 and the clamping plate 132 move towards the middle synchronously; until the clamping jaws 13 are close to both sides of the battery pack to be tested, at this time, the staff controls the double-axis telescopic rod 125 to extend or contract according to the size of the battery pack to be tested, so that the dead angle of the battery pack to be tested is located at the right angle between the limiting plate 131 and the end face of the clamping jaw 13. Subsequently, the sliding plate 123 continues to move closer to the middle. During the process, both sides of the battery pack to be tested will contact the support plates 133 on both sides of the clamping jaws 13. Subsequently, the clamping jaws 13 squeeze and limit the battery pack to be tested. Both sides of the battery pack to be tested will squeeze the support plate 133, and the support plate 133 moves towards the inside of the placement groove 134, and the clamping plate 132 moves towards the inside of the limiting groove 127; until the clamping plate 132 completely enters the inside of the limiting groove 127, so that a complete whole is formed between the clamping jaws 13, the slider 126 and the sliding plate 123, avoiding the problem that the clamping jaws 13 and the slider 126 are unstable on the sliding plate 123 when testing the battery pack to be tested. Relative to the position locking of the double-axis telescopic rod 125 on the slider 126, the clamping plate 132 provides another stable support, improving the service life of the double-axis telescopic rod 125;

[0059] And an airbag 135 is arranged inside the placement groove 134. The airbag 135 is of a bellows structure, and the first spring is located inside the airbag 135. A rectangular groove 136 is opened at one end of the support plate 133 close to the support frame 122. A rubber bladder 137 is hermetically arranged inside the rectangular groove 136, and the rubber bladder 137 is communicated with the airbag 135. When the support plate 133 moves towards the placement groove 134 and during the process that the support plate 133 is inserted into the limiting groove 127, the airbag 135 is squeezed, the first spring in the airbag 135 is squeezed, and the gas in the middle of the airbag 135 enters into the rubber bladder 137, and the rubber bladder 137 expands, so that an expanded rubber bladder 137 is formed between the battery under test and the included angle between the support plate 133, and the battery under test is in flexible contact with the clamping jaw 13, thereby improving the protection and buffering effects on both sides of the battery under test package and avoiding the problem of wear on the side of the battery under test package;

[0060] When extinguishing the fire and cooling the battery under test package, the sliding plate 123 moves away from the battery under test package, and no longer squeezes and limits the side of the battery under test package, so that the battery under test package can freely slide off the support frame 122; at this time, the first spring between the placement groove 134 and the support plate 133 performs elastic reset, the first spring pushes the support plate 133, the support plate 133 moves away from the placement groove 134, and at the same time, the clamping plate 132 falls off from the limiting groove 127 and resets.

[0061] Embodiment 3:

[0062] As Figures 3 to 12 shown; a supplementary block 15 is fixed to the inner side of the included angle of the clamping jaw 13. An embedding groove 151 is opened at one end of the clamping jaw 13 close to the support plate. The embedding groove 151 is located at the position between the sliding groove 128 and the limiting plate 131. The embedding groove 151 extends into the inside of the supplementary block 15. An embedding block 152 is slidably connected inside the embedding groove 151. The embedding block 152 is located at the lower part of the embedding groove 151. A fixing plate 153 is arranged at the upper end of the embedding block 152. The fixing plate 153 is located at the upper part of the embedding groove 151; a plurality of adjusting grooves 154 are uniformly opened on the fixing plate 153, and an adjusting plate 155 is slidably connected inside each adjusting groove 154; a second spring is arranged between the embedding block 152 and the embedding groove 151; a through groove 156 is opened at one end of the supplementary block 15 close to the clamping plate 132, and the through groove 156 is communicated with the embedding groove 151 located inside the supplementary plate. A hinge wheel 157 is rotatably connected inside the through groove 156; a pulling rope 158 is arranged at one end of the clamping plate 132 close to the supplementary block 15, and the other end of the pulling rope 158 is fixed to the embedding block 152 through the through groove 156, and the pulling belt is located outside the hinge wheel 157.

[0063] The specific working process is as follows:

[0064] A supplementary block 15 is arranged inside the included angle, and an embedding groove 151 is opened at one end of the included angle close to the support plate. The embedding groove 151 extends into the supplementary block 15, and an embedding block 152 is slidably connected inside the embedding groove 151. A fixing plate 153 is arranged on the embedding block 152, and the embedding block 152 is located at the lower end of the embedding groove 151, and the fixing plate 153 is located at the upper end of the embedding groove 151. A second spring is arranged between the embedding block 152 located at the lower end of the embedding groove 151 and the embedding groove 151, and the elasticity of the second spring is less than that of the first spring. And a through groove 156 is opened at one end of the supplementary block 15 close to the clamping plate 132. The through groove 156 communicates with the embedding groove 151 located inside the supplementary block 15, and a hinge wheel 157 is arranged inside the through groove 156. A pulling rope 158 is arranged at one end of the clamping plate 132 close to the supplementary block 15. The other end of the pulling rope 158 is fixed on the embedding block 152 through the through groove 156, and the pulling belt is located outside the hinge wheel 157;

[0065] On the basis of the above embodiment, when the support plate 133 moves towards the placement groove 134, the clamping plate 132 moves towards the limiting groove 127, and the first spring is compressed. At the same time, the pulling belt between the clamping plate 132 and the hinge wheel 157 becomes slack. At this time, the second spring inside the embedding groove 151 pushes the embedding block 152, and the embedding block 152 slides outwards of the embedding groove 151. At the same time, the embedding block 152 drives the fixing plate 153 and the adjusting plate 155 on the fixing plate 153 to move outwards synchronously. During this process, multiple adjusting plates 155 gradually contact the outer side of the battery pack to be tested. The outer side of the battery pack to be tested pushes the adjusting plate 155, and the adjusting plate 155 in contact with the outer side of the battery pack to be tested moves towards the embedding groove 151, while the adjusting plate 155 with a horizontal height higher than the upper end of the battery pack to be tested does not contact the battery pack to be tested, so that the adjusting plate 155 located at the upper end of the battery pack to be tested extends into the upper end of the battery pack to be tested to limit the upper end of the battery pack to be tested. When the needle punching device 2 punches and squeezes the battery pack to be tested from the lower end upwards, the battery pack to be tested cannot move upwards, thereby better limiting the battery pack to be tested and improving the needle punching test efficiency;

[0066] And when the sliding plate 123 moves towards both sides, the battery pack to be tested no longer squeezes the support plate 133. The first spring between the support plate 133 and the placement groove 134 is elastically reset, and the clamping plate 132 moves away from the limiting groove 127. The clamping plate 132 pulls the pulling belt, and the pulling belt pulls the embedding block 152. The embedding block 152 retracts into the embedding groove 151. At this time, the adjusting plate 155 squeezed by the battery pack to be tested contacts the inside of the embedding groove 151, and the inner wall of the embedding groove 151 pushes the adjusting plate 155, so that the adjusting plate 155 slides inside the adjusting groove 154 on the fixing plate 153, and the adjusting plate 155 is reset.

[0067] Embodiment 4:

[0068] As shown in Figures 2 to 12 Figure; an installation groove 16 is formed in the inner wall of the limiting plate 131, a push plate 17 is slidably connected inside the installation groove 16, and one end of the push plate 17 penetrates through the inner wall of the installation groove 16 and is located outside the limiting plate 131; strip plates 171 are arranged at the upper and lower ends of the push plate 17 located inside the installation groove 16, and a flexible sheet 18 is arranged in the middle of the two strip plates 171;

[0069] The strip plate 171 is hinged to the push plate 17, and the flexible sheet 18 is a flexible rubber sheet.

[0070] The specific working process is as follows:

[0071] By forming the installation groove 16 in the inner wall of the limiting plate 131, sliding the push plate 17 inside the installation groove 16, so that one end of the push plate 17 penetrates through the inner wall of the installation groove 16, strip plates 171 are arranged at the upper and lower ends of the push plate 17 located inside the installation groove 16, a flexible sheet 18 is arranged between the two strip plates 171, the strip plate 171 is hinged to the push plate 17, and the flexible sheet 18 is a flexible rubber sheet. When the outer side of the battery pack to be tested is arc-shaped, the staff pushes the end of the push plate 17 located outside the limiting plate 131, so that the push plate 17 pushes out the strip plates 171 and the flexible sheet 18 inside the installation groove 16. At this time, when the battery pack to be tested moves towards the right angle between the limiting plate 131 and the end face of the clamping jaw 13, the side surface of the battery pack to be tested will contact the flexible sheet 18, and then squeeze the flexible sheet 18. After the flexible sheet 18 is squeezed, the middle part of the flexible sheet 18 sinks inward, and at the same time, the two ends of the flexible sheet 18 pull the two strip plates 171, and the two strip plates 171 bend towards the middle of the battery pack to be tested, realizing that the cooperation of the flexible sheet 18 and the strip plates 171 can tightly wrap the flexible outer side of the battery pack to be tested, thereby improving the fixing effect on the battery pack to be tested with an arc-shaped edge and reducing the wear between the battery pack to be tested and the clamping jaw 13.

[0072] 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 by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A power lithium battery puncture tester, the puncture tester comprises a body and a puncture device, the puncture device is arranged inside the body; characterized in that; Also includes: The slide rails are symmetrically arranged on both sides of the upper end of the machine body, and one end of the slide rail is an arc-shaped downward structure; The placing rack is rectangular, and pulleys are arranged at the lower ends of both sides of the placing rack, and the pulleys are slidably connected to the slide rails, and two driving columns are arranged on each side of the placing rack; two supporting frames are symmetrically arranged in the middle of the placing rack; Sliding plates, the number of which is two, which are slidably connected to the inside of the placement rack, and the sliding plates are symmetrically distributed on both sides of the two support racks; Clamping jaws, each sliding plate is provided with two clamping jaws, and the clamping jaws on each sliding plate correspond to each other; Chains, which are symmetrically distributed at both ends of the machine body, are driven by a driving motor arranged on the machine body; each chain is provided with a drag pin, and each drag pin is located between two driving columns on the same side; A water tank is arranged on one side of the arc-shaped slide rail and is located at the lower end of the slide rail; A plurality of limit grooves are provided at the end of each sliding plate close to each other; a sliding groove is provided at the end of the clamping jaw close to the support frame, a card plate is slidably connected inside the sliding groove, and a support plate is provided at the end of the card plate away from the limit groove; a placement groove is provided at the end of the clamping jaw close to the support frame, and the size of the placement groove is the same as that of the support plate; a spring is provided between the support plate and the placement groove; An airbag is arranged inside the placement groove, and the airbag is an accordion structure; and a spring between the support plate and the placement groove is located inside the airbag; a rectangular groove is opened at one end of the support plate close to the support frame, and a rubber bag is sealed inside the rectangular groove; and the rubber bag is connected to the airbag.

2. A power lithium battery puncture tester as claimed in claim 1, characterized in that: The clamping jaws are of triangular plate structure, and a limiting plate is arranged at one end of each clamping jaw close to the supporting frame; the limiting plate is located at the bending part of the clamping jaws, and the limiting plate is perpendicular to the supporting frame.

3. A power lithium battery puncture tester as claimed in claim 1, characterized in that: A driving groove is opened in the middle of each sliding plate, a double-axis telescopic rod is fixed in the middle of the driving groove, two sliders are slidably connected inside each driving groove, and the two sliders inside each driving groove are connected to the two ends of the double-axis telescopic rod; and the clamping claw is set on the slider.

4. A power lithium battery puncture tester as claimed in claim 1, characterized in that: A supplementary block is fixed on the inner side of the angle of the clamping jaw, and an embedding groove is provided on one end of the clamping jaw close to the supporting plate, and the embedding groove is located between the sliding groove and the limiting plate, and the embedding groove extends into the interior of the supplementary block, and the embedding block is slidably connected inside the embedding groove, and the embedding block is located at the lower part of the embedding groove, and a fixed plate is provided on the upper end of the embedding block, and the fixed plate is located at the upper part of the embedding groove; a plurality of adjustment grooves are evenly provided on the fixed plate, and an adjustment plate is slidably connected inside each adjustment groove; a spring 2 is provided between the embedding block and the embedding groove; a through groove is provided on one end of the supplementary block close to the card plate, and the through groove is connected to the embedding groove located inside the supplementary plate, and a hinge wheel is rotatably connected inside the through groove; a pull rope is provided on one end of the card plate close to the supplementary block, and the other end of the pull rope is fixed to the embedding block through the through groove, and the pull belt is located on the outer side of the hinge wheel.

5. A power lithium battery puncture tester as claimed in claim 4, characterized in that: An installation groove is provided on the inner wall of the limiting plate, and a push plate is slidably connected to the inside of the installation groove. One end of the push plate passes through the inner wall of the installation groove and is located on the outside of the limiting plate. Strip plates are provided at the upper and lower ends of the push plate located inside the installation groove, and a flexible sheet is provided in the middle of the two strip plates.

6. A power lithium battery puncture tester as claimed in claim 5, characterized in that: The strip plate is hinged on the push plate, and the flexible sheet is a flexible rubber sheet.

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