Power lithium battery needling testing machine

Abstract

The invention relates to the technical field of lithium battery acupuncture tests, in particular to a power lithium battery acupuncture testing machine. When the placing frame moves to one end, close to the water tank, of the sliding rail and is guided by the arc-shaped downward bending of the sliding rail, the placing frame inclines downwards, so that the to-be-tested battery is influenced by the gravity of the to-be-tested battery, the to-be-tested battery slides into the water tank from the placing frame, and water in the water tank cools and extinguishes fire of the to-be-tested battery. Compared with spraying and fire extinguishers, the to-be-tested battery is directly soaked in water for cooling and fire extinguishment, the to-be-tested battery pack can be completely soaked in water, the water can make full contact with all parts of the battery pack, a large amount of heat is rapidly taken away, the temperature of the battery pack is effectively reduced, and further development of thermal runaway of the battery is fundamentally inhibited; continuous combustion is prevented, active substances in the battery pack can fully act with water, the energy in the battery is reduced, and the possibility of re-combustion is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery puncture test, in particular to a power lithium battery puncture test machine. Background Art

[0002] With the widespread use of lithium batteries in electric vehicles and portable devices, their safety has become an important issue; During the use of automotive power batteries, due to factors such as the road environment during driving or transportation, it is easy to experience mechanical loads such as vibration, impact, and stone impact; especially in extreme cases, if the power battery is subjected to damage such as strong external force squeezing or sharp object puncture, it will cause short circuits, temperature rise, and pressure rise inside the battery, and eventually cause thermal runaway of the power battery, fire, explosion and other safety issues. Therefore, power battery safety testing is essential; Existing power battery puncture and extrusion test devices include vertical ball impact and extrusion test 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 the power battery is subjected to a puncture test in the laboratory, the power battery will be squeezed and the body will heat up or even catch fire. By setting up the fire extinguishing part, if the battery pack sample has thermal runaway and fire in the middle, the sample battery pack can be cooled and extinguished. Most of the battery packs are extinguished by using fire extinguishers and sprays. However, when using a fire extinguisher to cool down and extinguish a battery pack, a fire in a battery pack is usually caused by internal thermal runaway. Although a 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 it is easy to reignite. When using the spraying method, although the spraying water 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 possible to quickly and comprehensively reduce the internal temperature of the battery pack.

[0003] In summary, in order to solve the technical problem raised in this article, the present invention proposes a power lithium battery puncture tester. Summary of the invention

[0004] The present invention provides a power lithium battery puncture tester, which comprises a body and a puncture device, wherein the puncture device is arranged inside the body; and further comprises: 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, two of 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 dragging pin, and each dragging pin is located between two driving posts on the same side; A water tank is arranged on one side of the slide rail which is an arc-shaped structure, and the water tank is located at the lower end of the slide rail.

[0005] As a preferred solution of the present application, the clamping jaw is a triangular plate structure, and a limiting plate is provided at one end of each clamping jaw close to the support frame; the limiting plate is located at the bending part of the clamping jaw, and the limiting plate is perpendicular to the support frame.

[0006] As a preferred solution of the present application, a driving groove is opened in the middle of each sliding plate, a biaxial 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 biaxial telescopic rod; and the clamping claws are arranged on the sliders.

[0007] As a preferred solution of the present application, a plurality of limit grooves are provided at one end of each sliding plate close to each other; a sliding groove is provided at one 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 one end of the card plate away from the limit groove; a placement groove is provided at one 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.

[0008] As a preferred solution of the present application, an airbag is arranged inside the placement groove, and the airbag has 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] The beneficial effects of the present invention are as follows: 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

[0013] Figure 1 is a three-dimensional diagram of the test device in the present invention; Figure 2 yes Figure 1 The front view in; Figure 3 It is a structural view of the driving motor, the slide rail and the chain in the present invention; Figure 4 It is a structural view of the placement frame, the support frame and the clamping claws in the present invention; Figure 5 yes Figure 4A partial cross-sectional view of the middle rack; Figure 6 is a cross-sectional view of the airbag and the support plate in the present invention; Figure 7 is a top cross-sectional view of the clamping jaw of the present invention; Figure 8 is a cross-sectional view of the embedding groove in the present invention; Fig. 9 It is a partial structural view of the clamping jaw in the present invention; Fig.10 It is a structural view of the limiting plate in the present invention; Fig.11 It is a structural view of the push plate, the strip plate and the flexible sheet in the present invention; Fig.12 It is a structural view of the embedding block, the adjusting block and the adjusting groove in the present invention.

[0014] In the figure: body 1, slide rail 11, drive motor 112, placement frame 12, drive column 121, support frame 122, sliding plate 123, drive slot 124, biaxial telescopic rod 125, slider 126, limit slot 127, slide slot 128, clamping claw 13, limit plate 131, card plate 132, support plate 133, placement slot 134, airbag 135, rectangular slot 136, rubber bag 137, chain 14, drag pin 141, supplementary block 15, embedded slot 151, embedded block 152, fixing plate 153, adjustment slot 154, adjustment plate 155, through slot 156, hinge wheel 157, pull rope 158, installation slot 16, push plate 17, strip plate 171, flexible sheet 18, acupuncture device 2, water tank 3. DETAILED DESCRIPTION

[0015] 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.

[0016] Embodiment 1:

[0017] like Figures 1 to 11 As shown; a power lithium battery puncture tester, the puncture tester includes a body 1 and a puncture device 2, the puncture device 2 is arranged inside the body 1; and also includes: The slide rail 11 is symmetrically arranged on both sides of the upper end of the body 1, and one end of the slide rail 11 is an arc-shaped downward structure; The placing rack 12 is rectangular, and pulleys are arranged at the lower ends of both sides of the placing rack 12, and the pulleys are slidably connected to the slide rails 11, and two driving columns 121 are arranged on both sides of the placing rack 12; two supporting frames 122 are symmetrically arranged in the middle of the placing rack 12; Sliding plates 123, the number of the sliding plates 123 is two, the sliding plates 123 are slidably connected to the inside of the placement frame 12, and the sliding plates 123 are symmetrically distributed on both sides of the two support frames 122; Clamping jaws 13, each sliding plate 123 is provided with two clamping jaws 13, and the clamping jaws 13 on each sliding plate 123 correspond to each other; Chains 14, two of which are symmetrically distributed at both ends of the machine body 1, and the chains 14 are driven by a driving motor 112 disposed on the machine body 1; each chain 14 is provided with a dragging pin 141, and each dragging pin 141 is located between two driving columns 121 on the same side; The water tank 3 is arranged on one side of the arc-shaped slide rail 11, and the water tank 3 is located at the lower end of the slide rail 11; The clamping jaws 13 are triangular plate structures, and a limiting plate 131 is provided at one end of each clamping jaw 13 close to the support frame 122; the limiting plate 131 is located at the bending part of the clamping jaw 13, and the limiting plate 131 is perpendicular to the support frame 122; A driving groove 124 is opened in the middle of each sliding plate 123, and a double-axis telescopic rod 125 is fixed in the middle of the driving groove 124. Two sliders 126 are slidably connected inside each driving groove 124. The two sliders 126 inside each driving groove 124 are connected to the two ends of the double-axis telescopic rod 125; and the clamping claw 13 is set on the slider 126.

[0018] The specific workflow is as follows: 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; 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; When the battery pack to be tested enters the water tank 3, the driving motor 112 is reversed, so that the chain 14 drives the dragging pin 141 to move toward the end away from the water tank 3. At this time, when the dragging pin 141 pushes the driving column 121 away from the end of the water tank 3, the dragging pin 141 drives the placement rack 12 to slide toward the end away from the water tank 3 through the driving column 121, so that the placement rack 12 is reset; When the sliding plate 123 moves, the clamping claw 13 on the sliding plate 123 limits the side of the battery pack to be tested, so that the clamping claw 13 is in the shape of a triangular plate, and a limiting plate 131 is set at the corner of the clamping claw 13, and the limiting plate 131 is perpendicular to the support frame 122. When the clamping claw 13 limits the battery pack to be tested, one end of the four clamping claws 13 close to the support frame 122 limits the two sides of the battery pack to be tested, and a right angle is formed between the limiting plate 131 and the clamping end of the clamping claw 13, so that the four corners of the battery pack to be tested are located at the right angle between the limiting plate 131 and the clamping end of the clamping claw 13, thereby limiting the four sides of the battery pack to be tested, thereby improving the stability of the battery pack to be tested on the placement rack 12 when the battery pack to be tested is impacted and punctured by the puncture device 2 from below; and by opening a driving groove in the middle of the sliding plate 123 124, a double-axis telescopic rod 125 is arranged in the middle of the driving groove 124, and two sliders 126 are slidably connected inside the driving groove 124, and the two sliders 126 are distributed at both ends of the double-axis telescopic rod 125, and the two sliders 126 are respectively connected to the two ends of the double-axis telescopic rod 125, so that when the battery pack to be tested is limited and clamped, the double-axis telescopic rod 125 can extend to both ends, or the double-axis telescopic rod 125 can be retracted toward the middle, so that the double-axis telescopic rod 125 can adjust the gap between the two sliders 126 on the same sliding plate 123, and 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 can be adjusted, so that when the battery pack to be tested is tested, the battery packs of different sizes can be limited, thereby improving the test efficiency.

[0019] Embodiment 2:

[0020] like Figures 1 to 12 As shown; a plurality of limit slots 127 are provided at the end of each sliding plate 123 close to each other; a sliding slot 128 is provided at the end of the clamping jaw 13 close to the support frame 122, a clamping plate 132 is slidably connected inside the sliding slot 128, and a support plate 133 is provided at the end of the clamping plate 132 away from the limit slot 127; a placement slot 134 is provided at the end of the clamping jaw 13 close to the support frame 122, and the size of the placement slot 134 is the same as that of the support plate 133; a spring 1 is provided between the support plate 133 and the placement slot 134; An airbag 135 is arranged inside the placement groove 134, and the airbag 135 is an accordion structure; and a 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 bag 137 is sealed inside the rectangular groove 136; and the rubber bag 137 is connected to the airbag 135.

[0021] The specific working process is as follows: On the basis of the above embodiment, a plurality of limiting grooves 127 are provided at one end of each sliding plate 123 close to each other, and a sliding groove 128 is provided at one end of the clamping jaw 13 close to the support frame 122, and a clamping plate 132 is slidably connected inside the sliding groove 128, a support plate 133 is provided at one end of the clamping plate 132 away from the limiting groove 127, and a placement groove 134 is provided 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, so that the support plate 133 can be embedded in the placement groove 134 during the movement, and a spring 1 is provided between the placement groove 134 and the support plate 133; When the card plate 132 is not embedded in the limiting groove 127, the spring 1 between the placement groove 134 and the support plate 133 is in a relaxed state; when the battery to be tested is installed on the support frame 122, the staff controls the two sliding plates 123 to move toward the middle, and the clamping claws 13 on each sliding plate 123 move toward the middle synchronously. During this process, the support plate 133 and the card plate 132 move toward the middle synchronously; until the clamping claws 13 approach the two sides of the battery pack to be tested. At this time, the staff controls the extension or contraction of the dual-axis telescopic rod 125 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 claw 13, and then the sliding plate 123 continues to approach the middle. During the process, the two sides of the battery pack to be tested The sides will contact the support plates 133 on the two side clamps 13, and then the clamps 13 will squeeze and limit the battery pack to be tested. The two sides of the battery pack to be tested will squeeze the support plates 133, and the support plates 133 will move into the placement groove 134, and the card plate 132 will move into the limiting groove 127; until the card plate 132 completely enters the limiting groove 127, so that the clamps 13, the slider 126 and the sliding plate 123 form a complete whole, avoiding the problem of the clamps 13 and the slider 126 being unstable on the sliding plate 123 when testing the battery pack to be tested. Compared with the position locking of the slider 126 by the double-axis telescopic rod 125, the card plate 132 provides another stable support, thereby improving the service life of the double-axis telescopic rod 125; In addition, an airbag 135 is arranged inside the placement groove 134. The airbag 135 is an accordion structure, and a spring 1 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 bag 137 is sealed inside the rectangular groove 136, and the rubber bag 137 is connected with the airbag 135. When the support plate 133 moves toward the placement groove 134, the support plate 133 is embedded into the limiting groove 127, and the airbag 135 is squeezed. The spring 1 in the airbag 135 is squeezed, and the gas in the middle of the airbag 135 enters the rubber bag 137, and the rubber bag 137 expands, so that an expanded rubber bag 137 is formed between the battery to be tested and the support plate 133 and the angle, so that the battery to be tested and the clamping claw 13 are in flexible contact, thereby improving the protection and buffering effect on both sides of the battery pack to be tested, and avoiding the problem of wear on the side of the battery pack to be tested. When the battery pack to be tested is being extinguished and cooled, the sliding plate 123 moves away from the battery pack to be tested, and no longer squeezes and limits the side of the battery pack to be tested, so that the battery pack to be tested can slide freely from the support frame 122; at this time, the spring 1 between the placement groove 134 and the support plate 133 is elastically reset, and the spring 11 pushes the support plate 133, and the support plate 133 moves away from the placement groove 134, and at the same time, the clamping plate 132 falls off and resets from the limiting groove 127.

[0022] Embodiment three:

[0023] like Figures 3 to 12 As shown; a supplementary block 15 is fixed to the inner side of the angle of the clamping jaw 13, and an embedding groove 151 is provided at one end of the clamping jaw 13 close to the support plate. The embedding groove 151 is located between the slide groove 128 and the limit plate 131, and the embedding groove 151 extends into the interior of the supplementary block 15. An embedding block 152 is slidably connected to the interior of the embedding groove 151, and the embedding block 152 is located at the lower part of the embedding groove 151. A fixing plate 153 is provided at the upper end of the embedding block 152, and the fixing plate 153 is located at the upper part of the embedding groove 151; a plurality of adjustment grooves 151 are evenly provided on the fixing plate 153. 54, an adjusting plate 155 is slidably connected to the inside of each adjusting slot 154; a spring 2 is arranged between the embedding block 152 and the embedding slot 151; a through slot 156 is provided at one end of the supplementary block 15 close to the card plate 132, the through slot 156 is connected to the embedding slot 151 located inside the supplementary plate, and a hinge wheel 157 is rotatably connected to the inside of the through slot 156; a pull rope 158 is provided at one end of the card plate 132 close to the supplementary block 15, the other end of the pull rope 158 is fixed to the embedding block 152 through the through slot 156, and the pull rope is located on the outside of the hinge wheel 157.

[0024] The specific workflow is as follows: A supplementary block 15 is provided inside the included angle, and an embedding groove 151 is provided 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 provided on the embedding block 152, and the embedding block 152 is located at the lower end of the embedding groove 151, the fixing plate 153 is located at the upper end of the embedding groove 151, and is located between the embedding block 152 at the lower end of the embedding groove 151 and the embedding groove 151 A spring 2 is provided, and the elasticity of the spring 2 is smaller than that of the spring 1; and a through slot 156 is provided at one end of the supplementary block 15 close to the card plate 132, the through slot 156 is communicated with the embedded slot 151 located inside the supplementary block 15, and a hinge wheel 157 is provided inside the through slot 156, and a pull rope 158 is provided at one end of the card plate 132 close to the supplementary block 15, the other end of the pull rope 158 is fixed to the embedded block 152 through the through slot 156, and the pull rope is located on the outside of the hinge wheel 157; On the basis of the above embodiment, when the support plate 133 moves in the direction of the placement groove 134, the clamping plate 132 moves in the direction of the limit groove 127, the spring 1 is squeezed, and at the same time, the drawstring between the clamping plate 132 and the hinge wheel 157 becomes relaxed. At this time, the spring 2 inside the embedded groove 151 pushes the embedded block 152, and the embedded block 152 slides to the outside of the embedded groove 151. At the same time, the embedded block 152 drives the fixed plate 153 and the adjustment plate 155 on the fixed plate 153 to move outward synchronously; in this process, the multiple adjustment plates 155 gradually contact the outside of the battery pack to be tested. Side contact: the outer side of the battery pack to be tested pushes the adjustment plate 155, and the adjustment plate 155 in contact with the outer side of the battery pack to be tested moves in the direction of the embedded groove 151, while the adjustment plate 155 at a level higher than the upper end of the battery pack to be tested does not contact the battery pack to be tested, so that the adjustment plate 155 located at the upper end of the battery pack to be tested extends to the upper end of the battery pack to be tested, and the upper end of the battery pack to be tested enters the limit position, so that when the puncture device 2 punctures and squeezes the battery pack to be tested from the lower end to the upper end, the battery pack to be tested cannot move upward, thereby better limiting the battery pack to be tested and improving the efficiency of the puncture test; When the sliding plate 123 moves to both sides, the battery pack to be tested no longer presses the support plate 133, and the spring between the support plate 133 and the placement groove 134 elastically resets, and the clamping plate 132 moves in the direction away from the limiting groove 127. The clamping plate 132 pulls the drawstring, and the drawstring pulls the embedding block 152, and the embedding block 152 retreats into the embedding groove 151. At this time, the adjustment 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 adjustment plate 155, so that the adjustment plate 155 slides inside the adjustment groove 154 on the fixed plate 153, so that the adjustment plate 155 is reset.

[0025] Embodiment 4:

[0026] like Figures 2 to 12As shown; the inner wall of the limiting plate 131 is provided with a mounting groove 16, and a push plate 17 is slidably connected inside the mounting groove 16, and one end of the push plate 17 passes through the inner wall of the mounting groove 16 and is located outside the limiting plate 131; the upper and lower ends of the push plate 17 located inside the mounting groove 16 are provided with strip plates 171, and the middle of the two strip plates 171 is provided with a flexible sheet 18; The strip plate 171 is hinged on the push plate 17, and the flexible sheet 18 is a flexible rubber sheet.

[0027] The specific workflow is as follows: By opening a mounting groove 16 on the inner wall of the limiting plate 131, the interior of the mounting groove 16 is slidably connected to the push plate 17, so that one end of the push plate 17 passes through the inner wall of the mounting groove 16, and strip plates 171 are provided at the upper and lower ends of the push plate 17 located inside the mounting groove 16, and a flexible sheet 18 is provided between the two strip plates 171, and the strip plate 171 is hinged on 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 an arc, 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 plate 171 and the flexible sheet 18 inside the mounting groove 16. At this time, when the battery pack to be tested moves toward the right angle between the limit plate 131 and the end face of the clamp 13, the side of the battery pack to be tested will contact the flexible sheet 18, and then the flexible sheet 18 will be squeezed. After the flexible sheet 18 is squeezed, the middle part of the flexible sheet 18 is recessed inward. 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 toward the middle part of the battery pack to be tested, so that the flexible sheet 18 and the strip plates 171 can cooperate to tightly wrap the flexible outer side of the battery pack to be tested, thereby improving the fixing effect of the curved edge of the battery pack to be tested, and reducing the wear between the battery pack to be tested and the clamp 13.

[0028] 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 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 slide rail which is an arc-shaped structure, and the water tank is located at the lower end of the slide rail.

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 3, characterized in that: 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.

5. A power lithium battery puncture tester as claimed in claim 4, characterized in that: 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.

6. A power lithium battery puncture tester as claimed in claim 4, 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.

7. A power lithium battery puncture tester as claimed in claim 6, 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.

8. A power lithium battery puncture tester as claimed in claim 6, 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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