A lithium battery puncture test equipment

Abstract

The invention discloses a lithium battery needle puncture test device, comprising a shell; a fixing mechanism is arranged in the needle puncture chamber, a transmission mechanism is arranged at the top of the fixing mechanism, the top of the fixing mechanism is slidably matched with the side wall of the shell, and the transmission mechanism is arranged in the side wall of the shell, an arc-shaped tooth plate is fixedly arranged on the top of the side of the cabinet door close to the needle puncture chamber, an arc-shaped groove for sliding of a tooth ring is arranged in the side wall of the shell, and one end of the arc-shaped tooth plate away from the cabinet door is transmission-matched with the transmission mechanism. When in use, after a battery to be tested is placed in the needle puncture chamber, the cabinet door is closed, and the arc-shaped tooth plate is pushed and moved by the cabinet door and then transmission-matched with the transmission mechanism, so that two groups of support rods are close to each other, and when the two groups of support rods are in contact with the battery to be tested and cannot move, the positioning plate starts to move toward the battery to be tested, and under the cooperation of the support rods and the positioning plate, the fixing and centering work of the battery to be tested is completed.

Description

Technical Field

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

[0002] Lithium batteries have been widely used in portable electronic devices, electric vehicles, energy storage systems, etc. due to their high energy density, long cycle life, and low memory effect. In order to study, evaluate, and verify the safety of batteries under internal short circuit conditions, a needle puncture test is required to simulate the fault condition, that is, to form a short circuit point by piercing the battery cell to be tested, so as to observe thermal runaway and other conditions that may occur at the short circuit point.

[0003] Chinese Patent Publication No.: CN220419408U discloses a battery puncture fixture and a puncture test machine, the battery puncture fixture comprises a lower clamp and an upper clamp, the lower clamp is fixed to the puncture workbench of the puncture test machine through a connecting piece, the lower clamp is penetrated by a guide pin, the guide pin is provided with a guide hole for penetrating the puncture needle of the puncture test machine, the puncture workbench is provided with an avoidance hole for penetrating the guide pin; the upper clamp is height-adjustably arranged on the lower clamp, the upper clamp can be close to the lower clamp so that the battery to be tested is clamped and fixed between the upper clamp and the lower clamp, and the upper clamp is provided with a puncture hole for passing the puncture needle.

[0004] In the prior art, during the puncture test of lithium batteries, it is necessary to fix the lithium batteries with a clamp to ensure the accuracy and safety of the test. When the lithium batteries are punctured, the surface center of the lithium batteries needs to be aligned with the puncture needle of the puncture device to simulate the most unfavorable short circuit situation. However, in actual use, after the personnel place the lithium battery, they fix the lithium battery by tightening screws or snap-fitting the clamp. The operation of the personnel can easily make it difficult for the surface center of the lithium battery to correspond to the puncture device, thereby affecting the subsequent test results. There are certain limitations.

[0005] Therefore, it is necessary to provide a lithium battery puncture test device to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a lithium battery puncture test device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lithium battery puncture test device, comprising a shell, a puncture chamber for placing a battery to be tested is arranged on the front of the shell, a cabinet door is hingedly arranged on the shell, a puncture mechanism for performing a puncture test on the battery to be tested is arranged on the top of the inner wall of the puncture chamber; a fixing mechanism is arranged in the puncture chamber, a transmission mechanism is arranged on the top of the fixing mechanism, the top of the fixing mechanism is slidably matched with the side wall of the shell, and the transmission mechanism is arranged in the side wall of the shell, an arc-shaped tooth plate is fixedly arranged on the top of the cabinet door near the puncture chamber, an arc-shaped groove for sliding of a gear ring is arranged in the side wall of the shell, and the end of the arc-shaped tooth plate away from the cabinet door is transmission-matched with the transmission mechanism;

[0008] When the cabinet door rotates, the cabinet door cooperates with the transmission mechanism through the arc-shaped tooth plate to drive the fixing mechanism to move relative to each other.

[0009] As a further solution of the present invention: the fixing mechanism includes a support rod; the support rod is symmetrically arranged along the center of the acupuncture chamber, and a horizontal plate is fixedly arranged at the bottom of the support rod, a first slide groove is symmetrically arranged along the center on one side of the horizontal plate close to the acupuncture mechanism, a positioning plate is elastically slidably arranged in the first slide groove, the side wall of the shell is provided with a through groove connected to the top of the acupuncture chamber, and the top of the support rod is elastically slidably connected to the through groove.

[0010] As a further solution of the present invention: the inner wall of the support rod is provided with a second slide groove connected with the first slide groove, the top of the inner wall of the second slide groove is provided with an extrusion column, and the extrusion column is symmetrically arranged along the center of the second slide groove, and a matching block corresponding to the extrusion column is fixedly arranged on the side of the second slide groove away from the positioning plate, a first pull rope is wound between the extrusion column and the matching block, and the top of the first pull rope passes through the side wall of the support rod and cooperates with the transmission mechanism, and the bottom end of the first pull rope away from the extrusion column is fixedly connected to the positioning plate.

[0011] As a further solution of the present invention: a trigger block is elastically slidably provided at the center of the horizontal plate, a telescopic airbag is provided on the inner wall side of the second slide groove close to the horizontal plate, and a first connecting tube is fixedly connected to the end of the telescopic airbag away from the trigger block, and the end of the first connecting tube away from the telescopic airbag passes through the matching block and cooperates with the limiting component.

[0012] As a further solution of the present invention: a matching plate is slidably fitted on the top of one side of the trigger block close to the first slide groove, the matching plate is slidably set in the first slide groove, and a piston rod is fixedly set at the bottom center of the matching plate, a piston groove matching the piston rod is set in the side wall of the cross plate, a convex column is fixedly set symmetrically along the center of the bottom of the piston groove, and a groove matching the convex column is set at the top of one end of the positioning plate in the first slide groove.

[0013] As a further solution of the present invention: a pressure strip is slidably provided at the center of the side wall of one side of the positioning plate close to the trigger block, and a bellows is provided at the end of the pressure strip away from the trigger block, a hose is fixedly provided at the end of the bellows away from the pressure strip, and the bellows is arranged in the side wall of the positioning plate, the hose is arranged in the first slide groove, and the end of the hose away from the positioning plate passes through the side wall of the cross plate and is connected with the piston groove.

[0014] As a further scheme of the present invention: the limit assembly includes a fixing box; one end of the first connecting tube away from the telescopic airbag is connected to the fixing box, and a fixing seat is elastically slidably provided in the fixing box, and a telescopic plate is rotatably provided on the end of the fixing seat away from the fixing box, and the telescopic plate is slidably matched with a sliding column on the side of the telescopic plate away from the support rod, and the top of the sliding column is fixedly provided with a top plate, and the top of the top plate is slidably matched with the limiting plate, and the top of the limiting plate is elastically connected with an L plate, and an extension plate is fixedly provided at one end of the L plate away from the limiting plate, and the end of the extension plate away from the L plate extends into the arc groove and slidably matches the arc tooth plate, and the bottom of the limiting plate is symmetrically provided with positioning columns along the center, and the top of the support rod is provided with a circular hole that slidably matches the positioning column, and a group of extrusion columns close to the matching block are fixedly provided with a resist rod that extends into the circular hole.

[0015] As a further solution of the present invention: the transmission mechanism includes a wire reel; the first pull rope is fixed to the wire reel at the top away from the support rod, the bottom outer periphery of the wire reel is rotatably engaged with a gear ring, and a resistance column is elastically provided on the side wall of the wire reel close to the gear ring, and a semicircular groove slidably engaged with the resistance column is provided on the side wall of the gear ring close to the wire reel, the gear ring is transmission-coordinated with the arc-shaped gear plate, and the bottom of the wire reel is rotatably connected to the side wall of the outer shell.

[0016] As a further solution of the present invention: a storage groove is provided in the side wall of the shell away from the cabinet door, and a second connecting tube is slidably provided in the storage groove. The end of the second connecting tube close to the cabinet door passes through the side wall of the shell and is fixed to the center of the cleaning plate, a second pull rope is provided between the top end of the second connecting tube and the arc-shaped tooth plate, and a round rod for the second pull rope to pass around is provided on one side of the bottom of the storage groove.

[0017] As a further solution of the present invention: a movable column is slidably provided at the bottom of the inner wall of the acupuncture chamber, a transmission cavity for sliding of the movable column is provided in the side wall of the shell, a wedge block is elastically slidably provided in one end of the transmission cavity away from the movable column, and the wedge block slides away from the top of the transmission cavity and extends into the acupuncture chamber to slide with the side of the cleaning plate close to the cabinet door.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: when in use, after the battery to be tested is placed in the puncture chamber, the cabinet door is closed, and the arc-shaped toothed plate is pushed and moved by the cabinet door and then cooperates with the transmission mechanism, so that the two groups of support rods are close to each other. When the two groups of support rods are in contact with the battery to be tested and cannot move, the positioning plate begins to move toward the battery to be tested, and with the cooperation of the support rods and the positioning plate, the fixation and centering of the battery to be tested are completed. When the cabinet door is opened, the second pull rope is pulled by the arc-shaped toothed plate to allow the first telescopic tube to move and retract. At this time, since the position of the cleaning plate is restricted, the third telescopic tube expands. When the battery to be tested is removed, the third telescopic tube is moved, retracted and reset, so that the second telescopic tube moves and expands to push the cleaning plate to move to clean the puncture chamber, thereby avoiding the accumulation of impurities generated by the puncture of the previous battery to be tested and affecting the next test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the top section of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the positioning plate and the pressure strip in the present invention.

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle.

[0023] Figure 5 For the present invention Figure 3 Schematic diagram of the structure at B in the figure.

[0024] Figure 6 It is a structural schematic diagram of the fixing mechanism in the present invention.

[0025] Figure 7 It is a structural schematic diagram of a cross-section of the middle portion of the support plate in the present invention.

[0026] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at C in the middle.

[0027] Fig. 9 It is a schematic diagram of the structure of the limiting component in the present invention.

[0028] Fig.10 It is a schematic diagram of the structure of the cleaning mechanism in the present invention.

[0029] Fig.11 For the present invention Fig.10 Schematic diagram of the structure at D in the figure.

[0030] Fig.12It is a schematic diagram of the structure of the wire reel and the gear ring in the present invention.

[0031] In the figure: 1, housing; 101, battery to be tested; 102, acupuncture mechanism; 2, cabinet door; 201, arc-shaped tooth plate; 3, support rod; 301, horizontal plate; 302, trigger block; 303, positioning plate; 304, pressure strip; 305, first slide; 306, second slide; 4, cleaning plate; 5, limit plate; 501, L plate; 502, extension plate; 503, positioning column; 6, telescopic airbag; 601, first connecting pipe; 7, first pull rope; 701, squeeze Pressure column; 702, matching block; 703, guide groove; 704, push rod; 8, matching plate; 801, piston rod; 802, piston groove; 803, hose; 804, boss; 9, telescopic plate; 901, fixed box; 10, top plate; 11, sliding column; 12, movable column; 13, transmission chamber; 14, wedge block; 15, resistance column; 16, second connecting pipe; 17, storage groove; 18, second pull rope; 19, arc groove; 20, wire coil; 21, gear ring. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 12 In an embodiment of the present invention, a lithium battery puncture test device includes a shell 1, preferably, a puncture chamber for placing a battery 101 to be tested is provided on the front of the shell 1, a cabinet door 2 is hingedly provided on the shell 1, and a puncture mechanism 102 for performing a puncture test on the battery 101 to be tested is provided on the top of the inner wall of the puncture chamber; a fixing mechanism for fixing and centering the battery 101 to be tested is provided in the puncture chamber, a transmission mechanism is provided at the top of the fixing mechanism, the top of the fixing mechanism is slidably matched with the side wall of the shell 1, and the transmission mechanism is provided in the side wall of the shell 1, an arc-shaped tooth plate 201 is fixedly provided on the top of the cabinet door 2 close to the puncture chamber, and an arc-shaped groove 19 for sliding the arc-shaped tooth plate 201 is provided in the side wall of the shell 1, and the end of the arc-shaped tooth plate 201 away from the cabinet door 2 is in transmission cooperation with the transmission mechanism, and when the cabinet door 2 rotates, the cabinet door 2 drives the fixed mechanism to move the battery 101 to be tested through the arc-shaped tooth plate 201 and the transmission mechanism.

[0033] When in use, open the cabinet door 2, the cabinet door 2 rotates and opens to drive the arc-shaped toothed plate 201 to move, at this time, the fixing mechanism moves and opens, and then the battery 101 to be tested is placed in the acupuncture chamber, and the cabinet door 2 is closed, the cabinet door 2 rotates and closes and pushes the arc-shaped toothed plate 201 to move, and the movement of the arc-shaped toothed plate 201 will cooperate with the transmission mechanism, and then the transmission mechanism drives the fixing mechanism to move toward the battery 101 to be tested to complete the fixation and centering of the battery 101 to be tested, and then the acupuncture mechanism 102 can be started to perform acupuncture test on the battery 101 to be tested.

[0034] The acupuncture mechanism 102 specifically includes an acupuncture needle and a driving cylinder. The driving cylinder is fixedly arranged on the top of the inner wall of the acupuncture chamber, and the acupuncture needle is fixedly arranged on the bottom telescopic output end of the driving cylinder. When in use, the battery 101 to be tested is fixed by the fixing mechanism and the surface center of the battery 101 to be tested is made to correspond to the acupuncture needle under the action of the fixing mechanism. Then, the driving cylinder is started to push the acupuncture needle toward the battery 101 to be tested, so that the acupuncture needle penetrates the battery shell to simulate an internal short circuit scenario. The specific related structure and detailed working principle of the acupuncture mechanism 102 are all existing technologies and will not be described in detail here.

[0035] See also Figure 1-Figure 7 Preferably, the fixing mechanism includes a support rod 3; the support rod 3 is symmetrically arranged along the center of the acupuncture chamber, and a horizontal plate 301 is fixedly arranged at the bottom of the support rod 3, and a first slide groove 305 is symmetrically arranged along the center on one side of the horizontal plate 301 close to the acupuncture mechanism 102, and the top half of the opposite ends of the two groups of first slide grooves 305 are in a connected state, and a positioning plate 303 is elastically slidably arranged in the first slide groove 305 through a spring, and a side wall of the housing 1 is provided with a through groove connected to the top of the acupuncture chamber, and the top of the support rod 3 is elastically slidably connected to the through groove through a spring. When in use, in the initial state that the cabinet door 2 is opened relative to the acupuncture chamber, the two The two groups of support rods 3 are respectively close to the two sides of the inner wall of the acupuncture chamber. At this time, the two groups of support rods 3 are farthest apart, and the arc-shaped toothed plate 201 is not coordinated with the transmission mechanism at this time; after the battery 101 to be tested is placed in the acupuncture chamber, the cabinet door 2 is closed, and the arc-shaped toothed plate 201 is pushed and moved by the cabinet door 2 and then cooperates with the transmission mechanism, so that the two groups of support rods 3 are close to each other. When the two groups of support rods 3 are in contact with the battery 101 to be tested and cannot move, the positioning plate 303 starts to move toward the battery 101 to be tested, and with the cooperation of the support rods 3 and the positioning plate 303, the fixation and centering of the battery 101 to be tested is completed.

[0036] Further, preferably, the inner wall of the support rod 3 is provided with a second slide groove 306 connected to the first slide groove 305, the inner wall top of the second slide groove 306 is provided with an extrusion column 701, and the extrusion column 701 is symmetrically arranged in two groups along the center of the second slide groove 306, and a matching block 702 corresponding to the extrusion column 701 is fixedly provided on the side of the second slide groove 306 away from the positioning plate 303, and guide grooves 703 are provided on both sides of the inner wall of the second slide groove 306, and the two ends of a group of extrusion columns 701 close to the matching block 702 are connected to the second slide groove 306. The guide groove 703 is elastically slidably connected, and a curved surface matching the extrusion column 701 is arranged on one side of the matching block 702 close to a group of extrusion columns 701. A first pull rope 7 is wound between the extrusion column 701 and the matching block 702. When the extrusion column 701 and the matching block 702 are kept horizontal, the first pull rope 7 is restricted by the extrusion column 701 and the matching block 702, so that the first pull rope 7 will not move when subjected to force, and the top end of the first pull rope 7 passes through the side wall of the support rod 3 to cooperate with the transmission mechanism, and the first pull rope 7 is far away The bottom end of the extrusion column 701 is fixedly connected to the positioning plate 303. Since the positioning plate 303 is provided with two groups, the bottom of the first pull rope 7 is a structure divided into two parts and is respectively fixed to the two groups of positioning plates 303. When in use, in the initial state, the positions of the two groups of extrusion columns 701 are flush, and the positioning plate 303 is at the end of the cross plate 301. When the cabinet door 2 is closed, the cabinet door 2 cooperates with the arc-shaped tooth plate 201 and the transmission mechanism, so that the transmission mechanism reels the first pull rope 7, and at this time the first pull rope 7 is pulled by force. Since the extrusion column 701 and the matching block 702 are flush, the first pull rope 7 is collected to make the support rods 3 approach each other. When the support rods 3 complete the fixation and centering of the battery 101 to be tested, a group of extrusion columns 701 moves downward, and then the transmission mechanism continues to rewind the first pull rope 7, so that the positioning plates 303 are close to each other, thereby completing the re-fixation and centering of the battery 101 to be tested, so that after the battery 101 to be tested is fixed by the support rod 3 and the positioning plate 303, its surface center corresponds to the puncture needle.

[0037] Furthermore, preferably, a trigger block 302 is elastically slidably provided at the center of the horizontal plate 301 through an elastic column, a telescopic airbag 6 is provided on one side of the inner wall of the second slide groove 306 close to the horizontal plate 301, and the end of the telescopic airbag 6 away from the trigger block 302 is fixedly connected with a first connecting tube 601, the first connecting tube 601 is arranged in the second slide groove 306, and the end of the first connecting tube 601 away from the telescopic airbag 6 passes through the matching block 702 and cooperates with a limiting component, and the limiting component is arranged in the side wall of the shell 1 at the top of the support rod 3. When in use, when the support rod 3 is not in contact with When the battery to be tested 101 is in contact, the trigger block 302 protrudes from the horizontal plate 301, and the limiting assembly does not cooperate with the support rod 3. When the support rod 3 moves toward the battery to be tested 101, when the trigger block 302 contacts the battery to be tested 101, as the support rod 3 moves, the trigger block 302 will shrink in the horizontal plate 301. The movement of the trigger block 302 will push the telescopic airbag 6 to shrink. The contraction of the telescopic airbag 6 causes the gas therein to drive the limiting assembly to move toward the support rod 3 through the first connecting tube 601 to complete the limiting of the support rod 3. When the support rod 3 is limited, it cannot move.

[0038] See also Figure 3 , Figure 4 , Figure 7 Preferably, the trigger block 302 is slidably fitted with a matching plate 8 at the top end of one side close to the first slide groove 305, and a notch is provided on the matching plate 8 for the first pull rope 7 to pass through. The matching plate 8 is slidably arranged in the first slide groove 305, and an end of the trigger block 302 close to the matching plate 8 is provided with an inclined surface facing the matching plate 8. When the trigger block 302 moves into the cross plate 301, the matching plate 8 is driven to move downward a certain distance through the inclined surface, and a piston rod 801 is fixedly provided at the bottom center of the matching plate 8, and the side wall of the cross plate 301 A piston groove 802 is provided inside and matched with the piston rod 801. The piston rod 801 and the piston groove 802 are sealed and slidably connected, and the matching plate 8 can be elastically connected to the first slide groove 305, so that when the trigger block 302 protrudes from the horizontal plate 301, the matching plate 8 can automatically move and reset, and a protrusion 804 is fixedly provided symmetrically along the center at the bottom of the piston groove 802. There are multiple groups of protrusions 804 in a horizontal array, and a groove matched with the protrusion 804 is provided on the top of one end of the positioning plate 303 in the first slide groove 305.

[0039] Furthermore, preferably, a pressure strip 304 is slidably provided at the center of the side wall of one side of the positioning plate 303 close to the trigger block 302, and a retractable bellows is provided at the end of the pressure strip 304 away from the trigger block 302, gas or liquid is provided in the bellows, a hose 803 is fixedly provided at the end of the bellows away from the pressure strip 304, the bellows is arranged in the side wall of the positioning plate 303, the telescopic section of the bellows is movably arranged in the side wall of the positioning plate 303, the hose 803 is arranged in the first slide groove 305, and the end of the hose 803 away from the positioning plate 303 passes through the side wall of the cross plate 301 and is connected with the piston groove 802.

[0040] When in use, in the initial state, the trigger block 302 protrudes from the horizontal plate 301, the matching plate 8 is at the top position of the inner wall of the first slide groove 305, the positioning plate 303 is at the two ends of the horizontal plate 301, the pressure strip 304 protrudes from the positioning plate 303, and the bottom of the piston rod 801 is at the connection between the piston groove 802 and the hose 803; when the trigger block 302 moves toward the matching plate 8, the matching plate 8 moves downward a certain distance, and then the transmission mechanism pulls the positioning plate 303 to move toward the trigger block 302 through the first pull rope 7. When the positioning plate 303 moves inside, the bellows is squeezed, and the gas in the bellows enters the piston groove 802 through the hose 803. At this time, when the two groups of pressure strips 304 are moved and contracted in the positioning plate 303, the gases in the two corresponding groups of bellows enter the piston groove 802, which will cause the piston rod 801 to move downward, and then the matching plate 8 moves downward a certain distance to allow the protruding column 804 to extend into the groove, completing the limitation of the positioning plate 303, thereby ensuring that the battery 101 to be tested remains stable during acupuncture.

[0041] See also Figure 1-Figure 3 , Figure 6-Figure 12 Preferably, the limiting assembly includes a fixing box 901; one end of the first connecting tube 601 away from the telescopic airbag 6 is connected to the fixing box 901, and a fixing seat is elastically slidably connected inside the fixing box 901 through a spring, and the fixing box 901 is arranged at the top position of one side of the support rod 3 close to the cabinet door 2, and the ends of the two groups of fixing seats away from the fixing boxes 901 are rotatably provided with a telescopic plate 9, that is, the two ends of the telescopic plate 9 are rotatably connected to the two groups of fixing seats, so that when the two groups of support rods 3 approach each other, the telescopic plate 9 will automatically shrink, thereby preventing the support rod 3 from moving and getting stuck.

[0042] The side of the telescopic plate 9 away from the support rod 3 is slidably matched with a sliding column 11, and the side of the sliding column 11 away from the telescopic plate 9 is elastically connected to the inner wall of the shell 1 through an elastic column, and the top of the sliding column 11 is fixedly provided with a top plate 10, and the top of the top plate 10 is slidably matched with a limiting plate 5, and the top of the limiting plate 5 is elastically connected with an L plate 501 through a spring, and a spring is provided between the L plate 501 and the side wall of the shell 1, and an extension plate 502 is fixedly provided at the bottom of the end of the L plate 501 away from the limiting plate 5, and the extension plate 502 is fixedly provided. 02, one end away from the L plate 501 extends into the arc groove 19 and slides with the arc tooth plate 201, the bottom of the limit plate 5 is symmetrically provided with a positioning column 503 along the center, the top of the support rod 3 is provided with a circular hole that slides with the positioning column 503, a group of extrusion columns 701 close to the matching block 702 are fixed with a support rod 704 that extends into the circular hole, the end of the arc tooth plate 201 close to the extension plate 502 is provided with a downward inclined surface, and the extension plate 502 is provided with an inclined surface facing the arc tooth plate 201.

[0043] When in use, in the initial state, the cabinet door 2 is in the open state, so that the end of the arc-shaped tooth plate 201 away from the cabinet door 2 does not cooperate with the extension plate 502, and the L plate 501 is in a position away from the support rod 3 under the action of the spring between the housing 1, so that the limit plate 5 is away from the support rod 3, so the positioning column 503 does not cooperate with the circular hole, and the support rod 704 extends into the circular hole, and the top plate 10 is directly below the limit plate 5 under the action of the elastic column on the sliding column 11 and slides with the limit plate 5, the fixing seat is retracted in the fixing box 901, the telescopic plate 9 is at the maximum extension distance, and there is a space between the side of the telescopic plate 9 close to the sliding column 11 and the sliding column 11. When the cabinet door 2 is rotated and closed, the arc-shaped tooth plate 201 will slide with the extension plate 502 to push the extension plate 502 downward, thereby causing the L plate 501 to move downward, so that the limit plate 5 is subjected to the downward pushing force, and at the same time, the cabinet door 2 drives the transmission mechanism through the arc-shaped tooth plate 201 to reel in the first pull rope 7. At this time, the first pull rope 7 will pull the support rod 3 closer to the transmission mechanism. When the trigger block 302 moves toward the cross plate 301, the trigger block 302 squeezes the telescopic airbag 6 so that the gas in the telescopic airbag 6 enters the fixed box 901 through the first connecting pipe 601, and then causes the fixed seat to move toward the direction of the sliding column 11. When only one group of fixed seats extends out of the fixed box 901, since the sliding post 11 is arranged at the center of the telescopic plate 9, even if one set of fixing seats extends out of the fixing box 901, the telescopic plate 9 only tilts relatively, thereby not pushing the sliding post 11 to move. Only when both sets of fixing seats extend out of the fixing box 901, the telescopic plate 9 will push the sliding post 11 to move in the opposite direction away from the support rod 3, and then separate the top plate 10 from the limiting plate 5. When the top plate 10 is separated from the limiting plate 5, the limiting plate 5 will move downward under the action of elasticity, so that the positioning post 503 extends into the circular hole, and will push the push rod 704 to move downward. The push rod 704 moves and pushes a set of extrusion posts 701 to move downward, so that the two sets of extrusion posts There is a gap between 701, and then the transmission mechanism continues to reel in the first pull rope 7, but will not drive the support rod 3 to move, but will only drive the positioning plate 303 to move; when the acupuncture test is completed, the cabinet door 2 is opened to separate the arc-shaped tooth plate 201 from the extension plate 502, and then the extension plate 502 and the L plate 501 are moved and reset, so that the limit plate 5 and the positioning column 503 are moved and reset, and when the positioning column 503 is separated from the circular hole, the support rod 3 is moved and reset, and the support rod 3 is moved and reset, so that the trigger block 302 is moved and reset, and then the telescopic airbag 6, the fixing seat, the sliding column 11, and the top plate 10 are moved and reset, and finally the positioning plate 303 and the pressure strip 304 are moved and reset, ready for next use.

[0044] The transmission mechanism includes a wire reel 20, which is arranged between two groups of support rods 3; the first pull rope 7 is fixed to the wire reel 20 away from the top of the support rod 3, and the first pull rope 7 can be reeled or unreeled when the wire reel 20 rotates, and the bottom outer periphery of the wire reel 20 is rotated with a gear ring 21, and a resistance column 15 is elastically provided on the side wall of the wire reel 20 close to the gear ring 21 through a spring, and a semicircular groove that slides with the resistance column 15 is provided on the side wall of the gear ring 21 close to the wire reel 20. In this way, when the gear ring 21 rotates, the wire reel 20 will rotate due to the cooperation between the resistance column 15 and the semicircular groove. When the wire reel 20 is subjected to huge resistance, the rotation of the gear ring 21 will cause the resistance column 15 to slide and shrink inside the wire reel 20, thereby failing to drive the wire reel 20 to rotate. The plate 201 is transmission-coordinated, and the bottom of the wire coil 20 is rotationally connected to the side wall of the shell 1. During use, when the cabinet door 2 is rotated and closed, the arc-shaped tooth plate 201 is pushed to move, so that the arc-shaped tooth plate 201 moves and engages with the tooth ring 21, thereby driving the tooth ring 21 to rotate, so that the wire coil 20 rotates to reel in the first pull rope 7. When the support rod 3 and the positioning plate 303 complete the fixation and centering of the battery 101 to be tested, the first pull rope 7 can no longer be pulled, and the tooth ring 21 can no longer drive the wire coil 20 to rotate. When the cabinet door 2 is rotated and opened, the arc-shaped tooth plate 201 cooperates with the tooth ring 21, so that the tooth ring 21 drives the wire coil 20 to rotate and spread the first pull rope 7 wound thereon, and then when the arc-shaped tooth plate 201 is separated from the extension plate 502, the first pull rope 7 moves to reset.

[0045] See also Figure 1 , Fig.10Preferably, a storage groove 17 is provided in the side wall of the shell 1 away from the cabinet door 2, and a second connecting tube 16 is slidably provided in the storage groove 17. One end of the second connecting tube 16 close to the cabinet door 2 passes through the side wall of the shell 1 and is fixed to the center of the cleaning plate 4. A second pull rope 18 is provided between the top of the second connecting tube 16 and the arc-shaped tooth plate 201. The second connecting tube 16 includes an elbow and a first telescopic tube and a second telescopic tube. The two sets of telescopic tubes move relative to each other and the first telescopic tube is an elastic structure, that is, it can automatically expand and reset when no external force is applied. The first telescopic tube is provided in the storage groove 17, and the elbow is fixedly provided in the side wall of the shell 1, and the top end of the elbow opens toward the storage groove 17, the bottom end of the first telescopic tube is fixed to the top end of the elbow, and the other opening faces the cleaning plate 4, and the second telescopic tube is fixed at the elbow. One end is open toward the cleaning plate 4, and the end away from the elbow is fixed to the cleaning plate 4. The second pull rope 18 is arranged on the top of the first telescopic tube, and a round rod for the second pull rope 18 to bypass is arranged on one side of the bottom of the storage groove 17. When the cabinet door 2 is rotated to open, the second pull rope 18 can be pulled by the arc-shaped tooth plate 201 to move the first telescopic tube downward, so that the gas in the first telescopic tube is transported to the second telescopic tube, and then the cleaning plate 4 is pushed to move toward the cabinet door 2 and clean the inner wall of the acupuncture chamber, so as to avoid impurities on the bottom of the acupuncture chamber wall causing the battery 101 to be tested to be placed unsteadily during the next test; and when the cabinet door 2 is closed, the second pull rope 18 is relaxed to expand the first telescopic tube and move upward, and then the second telescopic tube is contracted, so that the cleaning plate 4 moves to its original position.

[0046] The diameter of the first telescopic tube is larger than that of the second telescopic tube, so that the cleaning plate 4 can be pushed to move better to complete the cleaning of the acupuncture chamber.

[0047] Further, preferably, a movable column 12 is slidably provided at the bottom of the inner wall of the acupuncture chamber, a transmission cavity 13 for sliding of the movable column 12 is provided in the side wall of the shell 1, a wedge block 14 is elastically slidably provided in the end of the transmission cavity 13 away from the movable column 12 through a spring, the wedge block 14 slides away from the top of the transmission cavity 13 and extends into the acupuncture chamber and slidably cooperates with the side of the cleaning plate 4 close to the cabinet door 2, and a square opening for the movable column 12 to pass through is provided at the bottom of the cleaning plate 4 corresponding to the position of the movable column 12, and when the wedge block 14 cooperates with the cleaning plate 4, the height of the wedge block 14 is higher than the height of the square opening.

[0048] A partition is provided on the top of the first telescopic tube, and a third telescopic tube is provided on the top of the partition (not shown in the figure). The third telescopic tube is an elastic structure, and the third telescopic tube is connected to the first telescopic tube. When the first telescopic tube is in an expanded state, the second telescopic tube and the third telescopic tube are in a contracted state; when the first telescopic tube is in a contracted state, the second telescopic tube will be in an expanded state, and the third telescopic tube will be in a contracted state; when the cleaning plate 4 is restricted by the wedge block 14, when the first telescopic tube is in a contracted state, the second telescopic tube will be in a contracted state, and the third telescopic tube will be in an expanded state.

[0049] When in use, in the initial state, the movable column 12 protrudes from the inner wall of the acupuncture chamber, the wedge block 14 is retracted in the transmission chamber 13, the cleaning plate 4 is in the position of the acupuncture chamber close to the cabinet door 2, the second pull rope 18 is in a taut state, the first telescopic tube and the third telescopic tube are in a retracted state, and the second telescopic tube is in an expanded state; when the acupuncture test is performed, the cleaning plate 4 is pushed to move toward the wedge block 14, and then the battery 101 to be tested is placed on the movable column 12, so that the movable column 12 moves downward, and the movable column 12 moves to make the wedge block 14 move upward to cooperate with the cleaning plate 4, so that the cleaning plate 4 is restricted to a position close to the second connecting tube 16. At this time, the first telescopic tube and the second telescopic tube are in a retracted state, and the third telescopic tube is in an expanded state. state, and then close the cabinet door 2, so that the arc-shaped toothed plate 201 moves, and the first telescopic tube expands and resets to the top of the storage groove 17 through the relaxation of the second pull rope 18, so that the third telescopic tube shrinks and resets; when the puncture test is completed, open the cabinet door 2 so that the arc-shaped toothed plate 201 pulls the second pull rope 18, so that the first telescopic tube moves and shrinks. At this time, since the position of the cleaning plate 4 is restricted, the third telescopic tube expands. When the battery 101 to be tested is removed, the movable column 12 and the wedge block 14 move and reset, and then the third telescopic tube moves and shrinks and resets, so that the second telescopic tube moves and expands to push the cleaning plate 4 to move to clean the puncture chamber, so as to avoid the accumulation of impurities generated by the puncture of the previous battery 101 to be tested and affect the next test.

Claims

1. A lithium battery puncture test device, comprising a housing, a puncture chamber for placing a battery to be tested is arranged on the front of the housing, a cabinet door is hingedly arranged on the housing, and a puncture mechanism for performing a puncture test on the battery to be tested is arranged on the top of the inner wall of the puncture chamber; characterized in that: The acupuncture chamber is provided with a fixing mechanism, the top of the fixing mechanism is provided with a transmission mechanism, the top of the fixing mechanism is slidably matched with the side wall of the shell, and the transmission mechanism is provided in the side wall of the shell, an arc-shaped tooth plate is fixedly provided on the top of the side of the cabinet door close to the acupuncture chamber, an arc-shaped groove for sliding of the gear ring is provided in the side wall of the shell, and the end of the arc-shaped tooth plate away from the cabinet door is in transmission match with the transmission mechanism; When the cabinet door rotates, the cabinet door cooperates with the transmission mechanism through the arc-shaped tooth plate to drive the fixed mechanism to move relative to the battery to be detected; The fixing mechanism comprises a support rod; the support rod is symmetrically arranged along the center of the acupuncture chamber, and a horizontal plate is fixedly arranged at the bottom of the support rod, a first slide groove is symmetrically arranged along the center of the side of the horizontal plate close to the acupuncture mechanism, a positioning plate is elastically slidably arranged in the first slide groove, a side wall of the shell is provided with a through groove connected to the top of the acupuncture chamber, and the top of the support rod is elastically slidably connected to the through groove; The inner wall of the support rod is provided with a second slide groove connected with the first slide groove, the inner wall top end of the second slide groove is provided with an extrusion column, and the extrusion column is symmetrically arranged along the center of the second slide groove, and a matching block corresponding to the extrusion column is fixedly arranged on the side of the second slide groove away from the positioning plate, a first pull rope is wound between the extrusion column and the matching block, and the top end of the first pull rope passes through the side wall of the support rod and cooperates with the transmission mechanism, and the bottom end of the first pull rope away from the extrusion column is fixedly connected to the positioning plate; A trigger block is elastically slidably provided at the center of the horizontal plate, a telescopic airbag is provided on the inner wall side of the second slide groove close to the horizontal plate, a first connecting tube is fixedly connected to the end of the telescopic airbag away from the trigger block, and the end of the first connecting tube away from the telescopic airbag passes through the matching block and matches the limiting component; The trigger block is slidably fitted with a matching plate at the top end of one side close to the first slide groove, the matching plate is slidably arranged in the first slide groove, and a piston rod is fixedly arranged at the bottom center of the matching plate, a piston groove adapted to the piston rod is arranged in the side wall of the cross plate, a convex column is fixedly arranged symmetrically along the center at the bottom of the matching plate, and a groove adapted to the convex column is arranged at the top of one end of the positioning plate in the first slide groove; A pressure strip is slidably provided at the center of the side wall of one side of the positioning plate close to the trigger block, and a bellows is provided at one end of the pressure strip away from the trigger block, a hose is fixedly provided at one end of the bellows away from the pressure strip, and the bellows is arranged in the side wall of the positioning plate, the hose is arranged in the first sliding groove, and one end of the hose away from the positioning plate passes through the side wall of the horizontal plate and is connected to the piston groove; The limit assembly comprises a fixing box; one end of the first connecting tube away from the telescopic airbag is connected to the fixing box, and a fixing seat is elastically slidably provided in the fixing box, and a telescopic plate is rotatably provided at one end of the fixing seat away from the fixing box, and a sliding post is slidably provided on the side of the telescopic plate away from the support rod for sliding cooperation with the sliding post, and the top of the sliding post is fixedly provided with a top plate, and the top of the top plate is slidably cooperated with the limiting plate, and the top of the limiting plate is elastically connected with an L plate, and an extension plate is fixedly provided at one end of the L plate away from the limiting plate, and one end of the extension plate away from the L plate extends into the arc groove and slides with the arc tooth plate, and the bottom of the limiting plate is symmetrically provided with a positioning post along the center, and a circular hole that slides with the positioning post is provided on the top of the support rod, and a resist rod that extends into the circular hole is fixedly provided on a group of extrusion posts close to the matching block; The transmission mechanism includes a wire reel; the first pull rope is fixed to the wire reel at the top away from the support rod, the bottom periphery of the wire reel is rotatably matched with a toothed ring, and a resistance column is elastically arranged on the side wall of the wire reel close to the toothed ring, and a semicircular groove slidably matched with the resistance column is arranged on the side wall of the toothed ring close to the wire reel, the toothed ring is transmission matched with the arc-shaped toothed plate, and the bottom of the wire reel is rotatably connected with the side wall of the shell; The bottom of the first pull rope is a structure divided into two parts, and is respectively fixed to two groups of positioning plates. When the cabinet door is closed, the cabinet door cooperates with the arc-shaped tooth plate and the transmission mechanism so that the transmission mechanism reels the first pull rope, and the first pull rope is pulled by force. Since the extrusion column and the matching block are flush, the reeling of the first pull rope will make the support rods approach each other. When the support rods complete the fixation and centering of the battery to be tested, a group of extrusion columns move downward, and then the transmission mechanism continues to reel in the first pull rope, so that the positioning plates approach each other.

2. A lithium battery puncture test device according to claim 1, characterized in that: A storage groove is provided in the side wall of the shell away from the cabinet door, and a second connecting tube is slidably provided in the storage groove. The end of the second connecting tube close to the cabinet door passes through the side wall of the shell and is fixed to the center of the cleaning plate. A second pull rope is provided between the top end of the second connecting tube and the arc-shaped tooth plate, and a round rod for the second pull rope to pass around is provided on one side of the bottom of the storage groove.

3. A lithium battery puncture test device according to claim 2, characterized in that: A movable column is slidably provided at the bottom of the inner wall of the acupuncture chamber, a transmission cavity for the sliding of the movable column is provided in the side wall of the shell, a wedge block is elastically slidably provided in one end of the transmission cavity away from the movable column, the wedge block slides away from the top end of the transmission cavity and extends into the acupuncture chamber and slidably cooperates with the side of the cleaning plate close to the cabinet door.

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