Soft package lithium battery packaging equipment and packaging method thereof

Abstract

The invention belongs to the field of soft package lithium battery production, and particularly relates to soft package lithium battery packaging equipment and a packaging method.The soft package lithium battery packaging equipment comprises a base, a support is fixedly connected to the top of the base, a motor is fixedly installed at the top of the support, and the output end of the motor extends into the support and is fixedly connected with a lead screw; according to the soft package lithium battery packaging equipment and the packaging method thereof, when the heat sealing cutter is controlled to move downwards to conduct heat sealing on a soft package lithium battery, liquid argon is discharged from the gas conveying pipeline through the gas conveying assembly, the discharged argon is wrapped through cooperation of the protection plate and the cover plate, the argon is prevented from being rapidly diffused, and the sealing effect of the soft package lithium battery is improved. Argon accumulated in the protection plate is used for dispersing air, so that the heat-sealed soft package lithium battery is conveniently protected, an aluminum plastic film and internal materials of the battery are effectively prevented from being subjected to oxidation reaction with oxygen at high temperature, the heat-sealed environment can be sealed through the cooperation of the protection plate and the cover plate, and dust is prevented from falling on the lithium battery.

Description

Technical Field

[0001] The invention belongs to the field of soft-pack lithium battery production, in particular to a soft-pack lithium battery packaging device and a packaging method thereof. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution; soft-pack lithium batteries are simply liquid lithium-ion batteries covered with a polymer shell. Soft-pack lithium batteries are generally packaged in aluminum-plastic film in structure. The aluminum-plastic film has extremely high barrier properties, formability, puncture resistance and stability. In the event of a safety hazard, the soft-pack battery will only bulge and crack at most. When the soft-pack lithium battery is packaged in aluminum-plastic film, the PP layer of the inner layer of the aluminum-plastic film is hot-melted, and after cooling, it plastically deforms to bond, thereby completing the package.

[0003] During the packaging process of soft-pack lithium batteries, an aluminum-plastic film needs to be wrapped around the outside of the lithium battery. During heat sealing, it is very easy to seal the outside air into the package. The heat-sealed air will undergo an oxidation reaction with the electrode material, reducing the battery's charge and discharge efficiency and cycle life. In addition, the soft-pack lithium battery in the heat-sealed state is not adequately protected, and dust can easily fall on the lithium battery, causing a short circuit in the soft-pack lithium battery after heat sealing.

[0004] To this end, the present invention provides a soft-pack lithium battery packaging device and a packaging method thereof. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve the problem that during heat sealing, the outside air is easily heat-sealed into the package, the heat-sealed air will undergo an oxidation reaction with the electrode material, reducing the charge and discharge efficiency and cycle life of the battery, and the soft-pack lithium battery in the heat-sealed state is not sufficiently protected, dust and the like are easily dropped on the lithium battery, resulting in a short circuit of the soft-pack lithium battery after heat sealing, the present invention proposes a soft-pack lithium battery packaging device and a packaging method thereof.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a soft-pack lithium battery packaging device described in the present invention comprises a base, a bracket is fixedly connected to the top of the base, a motor is fixedly installed on the top of the bracket, the output end of the motor extends to the inside of the bracket and is fixedly connected to a screw rod, the outer wall of the screw rod is connected to a slider through a screw nut pair, the slider is slidably connected to the bracket, one side of the slider is fixedly connected to a support plate, the bottom of the support plate is fixedly connected to a mounting frame, the bottom of the mounting frame is rotatably connected to the support frame, the bottom of the support frame is fixedly connected to a heat sealing knife, an adjustment component is arranged inside the mounting frame, a material storage cavity is opened inside the base, a liquid outlet groove is opened inside the base and located above the material storage cavity, one end of the liquid outlet groove extends to the inside of the material storage cavity, a gas transmission pipeline is fixedly connected to the top of the base, the bottom of the gas transmission pipeline extends to the inside of the liquid outlet groove, a gas transmission component is arranged inside the base, a protective plate is fixedly connected to the top of the base, and a heating platform is arranged inside the base and located above the liquid outlet groove.

[0007] Preferably, the gas delivery component includes a cavity, which is opened inside the base and located at the top of the liquid outlet groove, the inner wall of the cavity is slidably connected with a piston plate, the top of the piston plate is fixedly connected with a third sliding shaft, the top of the third sliding shaft passes through the base and is fixedly connected to the limiting plate, the outer wall of the third sliding shaft is sleeved with a third spring, the top of the third spring is fixedly connected to the limiting plate, and the bottom of the third spring is fixedly connected to the base, the inner wall of the liquid outlet groove is symmetrically provided with two one-way valves with the cavity as the center, and the two one-way valves are opened in the direction of the gas pipeline, the inner wall of the support plate is slidably connected with a push rod, the push rod is located directly above the limiting plate, the inner wall of the push rod is fixedly connected with a fourth sliding shaft, the fourth sliding shaft is slidably connected to the support plate, the outer wall of the fourth sliding shaft is sleeved with a fourth spring, the top of the fourth spring is fixedly connected to the support plate, the bottom of the fourth spring is fixedly connected to the push rod, the elastic force of the fourth spring is greater than the elastic force of the third spring, and the outer wall of the base is provided with a pressure relief valve used in conjunction with the material storage cavity.

[0008] Preferably, a corrugated groove is provided inside the liquid outlet trough, a heat conducting plate is provided at the bottom of the heating platform, a plurality of heat dissipation plates are fixedly connected to the bottom of the heat conducting plate at equal intervals, and the heat dissipation plates are located in the depressions of the corrugated groove.

[0009] Preferably, the outer wall of the mounting frame is slidably connected to a cover plate, and the inner wall of the mounting frame is symmetrically fixedly connected to two second sliding shafts, both of which are slidably connected to the cover plate, and the outer wall of the second sliding shaft is sleeved with a second spring, the bottom of the second spring is fixedly connected to the cover plate, and the top of the second spring is fixedly connected to the mounting frame.

[0010] Preferably, the inner wall of the gas pipeline is fixedly connected to a first fixing ring, the inner wall of the gas pipeline and a side away from the first fixing ring is fixedly connected to a second fixing ring, the inner wall of the second fixing ring is symmetrically slidably connected to two fifth sliding shafts, one end of the fifth sliding shaft is fixedly connected to a limiting block, the other end of the fifth sliding shaft is fixedly connected to a baffle, the outer wall of the fifth sliding shaft is sleeved with a fifth spring, one end of the fifth spring is fixedly connected to the baffle, and the other end of the fifth spring is fixedly connected to the second fixing ring.

[0011] Preferably, two second through grooves are symmetrically provided inside the protective plate, and a plurality of air outlets are equidistantly provided on the inner wall of the protective plate, the air outlets are communicated with the second through grooves, and a second guide plate is fixedly connected to the inner wall of the second through groove and on one side close to the air outlet, and the second guide plate is installed at an angle, and two guide plates are symmetrically fixedly connected to the inner wall of the protective plate, and the guide plates are in an arc shape, and a first through groove is provided inside the guide plate, one end of the first through groove is communicated with the second through groove, and the other end of the first through groove extends to the outer convex surface of the guide plate, and the first guide plate is fixedly connected to the outer convex surface of the guide plate.

[0012] Preferably, the adjustment assembly includes a first sliding shaft, the first sliding shaft is fixedly mounted on the inner wall of the support frame, the outer wall of the first sliding shaft is slidably connected to a connecting block, the inner wall of the mounting frame is slidably connected to a limiting shaft, the bottom of the limiting shaft is rotatably connected to the connecting block, the top of the limiting shaft is fixedly connected to a first spring, and the top of the first spring is fixedly connected to the mounting frame.

[0013] Preferably, a guide block is fixedly connected to the top of the base and located between the two guide plates, and both sides of the guide block are arranged as arc-shaped surfaces. Two groups of guide plates are symmetrically fixedly connected to the bottom of the cover plate, and the guide plates are all installed to be tilted downward.

[0014] Preferably, the inner wall of the mounting frame is symmetrically and slidingly connected to two downward pressure rods, the bottoms of the two downward pressure rods are fixedly connected to downward pressure plates, the tops of the two downward pressure rods are fixedly connected to sixth springs, and the tops of the sixth springs are fixedly connected to the mounting frame.

[0015] A packaging method for a soft-pack lithium battery packaging device, the packaging method is applicable to the above-mentioned soft-pack lithium battery packaging device, and the steps of the packaging method are as follows: S1: Place the soft-pack lithium battery on the base, and start the heating table to heat the bottom of the soft-pack lithium battery; S2: Start the motor to control the support plate to move downward, so that the heat sealing knife heat-seals the soft-pack lithium battery. One side of the heat sealing knife first contacts the side of the soft-pack lithium battery, and cooperates with the adjustment component to make the heat sealing knife gradually fit the aluminum-plastic film. S3: Liquid argon is loaded into the storage cavity. When the support plate moves downward, the gas transmission component is used to discharge the liquid argon in the storage cavity to protect the soft-pack lithium battery in heat sealing.

[0016] The beneficial effects of the present invention are as follows: 1. The soft-pack lithium battery packaging device and packaging method described in the present invention, when controlling the heat-sealing knife to move downward to heat-seal the soft-pack lithium battery, liquid argon is discharged from the gas transmission pipeline through the gas transmission component, and the discharged argon gas is wrapped by the cooperation of the protective plate and the cover plate to prevent the argon gas from spreading rapidly, and the air is dispersed by the argon gas accumulated in the protective plate, so as to protect the soft-pack lithium battery in the heat sealing, effectively prevent the aluminum-plastic film and the internal materials of the battery from oxidizing with oxygen at high temperature, and the cooperation of the protective plate and the cover plate can seal the heat sealing environment to prevent dust from falling on the lithium battery.

[0017] 2. The soft-pack lithium battery packaging equipment and packaging method described in the present invention can delay the circulation time of liquid argon in the liquid outlet tank by setting the corrugated groove. After the heating table is started, the heat conducting plate is heated. The heat of the heat conducting plate can be released by the heat dissipation plate, and the liquid argon in the corrugated groove is heated, so that the liquid argon is quickly vaporized, and sufficient argon gas is convenient for dispersing the air near the soft-pack lithium battery.

[0018] 3. The soft-pack lithium battery packaging device and packaging method described in the present invention, through the first guide plate and the second guide plate, the argon gas is discharged from the air outlet and impacts different positions of the soft-pack lithium battery, thereby further dissipating the air near the soft-pack lithium battery, and the argon gas is heated in advance to make the argon gas temperature higher, which is convenient for preheating the PP layer of the aluminum-plastic film, preventing the PP layer of the aluminum-plastic film from being heated unevenly, which affects the sealing of the soft-pack lithium battery after heat sealing.

[0019] 4. The soft-pack lithium battery packaging device and packaging method described in the present invention, by setting a first spring, one side of the heat-sealing knife first contacts one side of the soft-pack lithium battery, and as the heat-sealing knife rotates, the aluminum-plastic film is gradually attached, thereby facilitating the gradual discharge of air wrapped in the aluminum-plastic film while heat-sealing, preventing external air from being heat-sealed into the package.

[0020] 5. The soft-pack lithium battery packaging equipment and packaging method described in the present invention divide the argon gas entering the protective plate through the provided guide block, so that the argon gas forms two flows, thereby facilitating the protection of both sides of the soft-pack lithium battery, and starting the blocking of the guide block to make it difficult for the argon gas entering the protective plate to diffuse outward, thereby extending the residence time of the argon gas near the soft-pack lithium battery. When the argon gas floats upward, it will continue to flow downward on the guiding property of the inclined surface of the guide plate, preventing the argon gas from floating upward and being difficult to contact the soft-pack lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a stereogram of the present invention; Figure 2 It is a stereogram of another viewing angle of the present invention; Figure 3 is a cross-sectional view of the present invention; Figure 4 It is a three-dimensional diagram of the supporting frame and the heat sealing knife of the present invention in cooperation with each other; Figure 5 It is a top cross-sectional view of the protective plate and the guide plate of the present invention in cooperation with each other; Figure 6 It is an exploded view of the mounting frame of the present invention and the lower pressure rod in cooperation with each other; Figure 7 The present invention Figure 3 The enlarged view of point A in the middle; Figure 8 The present invention Figure 3 The enlarged view of point B in the middle; Fig. 9 The present invention Figure 3 Enlarged view of point C in the middle; Fig.10 The present invention Figure 3 Enlarged view of point D in the middle.

[0023] In the figure: 1, base; 2, bracket; 3, motor; 4, screw rod; 5, slider; 6, support plate; 7, mounting frame; 8, support frame; 9, heat sealing knife; 10, first sliding shaft; 11, connecting block; 12, limit shaft; 13, first spring; 14, protective plate; 15, second sliding shaft; 16, cover plate; 17, second spring; 18, guide plate; 19, first guide plate; 20, first through groove; 21, second through groove; 22, air outlet; 23, second guide plate; 24, guide block; 25, storage cavity; 26, liquid outlet; 27 , cavity; 28, piston plate; 29, third slide shaft; 30, third spring; 31, limit plate; 32, one-way valve; 33, fourth slide shaft; 34, fourth spring; 35, push rod; 36, heating table; 37, heat conduction plate; 38, heat sink; 39, corrugated groove; 40, gas pipeline; 41, first fixed ring; 42, second fixed ring; 43, fifth slide shaft; 44, limit block; 45, fifth spring; 46, baffle; 47, lower pressure rod; 48, lower pressure plate; 49, sixth spring; 50, pressure relief valve; 51, guide plate. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figures 1 to 10 As shown, the present invention provides a technical solution, a soft-pack lithium battery packaging device, including a base 1, a bracket 2 is fixedly connected to the top of the base 1, a motor 3 is fixedly installed on the top of the bracket 2, the output end of the motor 3 extends to the inside of the bracket 2 and is fixedly connected to a screw rod 4, the outer wall of the screw rod 4 is connected to a slider 5 through a screw nut pair, the slider 5 is slidably connected to the bracket 2, one side of the slider 5 is fixedly connected to a support plate 6, the bottom of the support plate 6 is fixedly connected to a mounting frame 7, the bottom of the mounting frame 7 is rotatably connected to a support frame 8, and the bottom of the support frame 8 is fixed A heat sealing knife 9 is connected, an adjusting component is arranged inside the mounting frame 7, a material storage cavity 25 is opened inside the base 1, a liquid outlet trough 26 is opened inside the base 1 and above the material storage cavity 25, one end of the liquid outlet trough 26 extends to the inside of the material storage cavity 25, a gas pipeline 40 is fixedly connected to the top of the base 1, the bottom of the gas pipeline 40 extends to the inside of the liquid outlet trough 26, a gas supply component is arranged inside the base 1, a protective plate 14 is fixedly connected to the top of the base 1, and a heating platform 36 is arranged inside the base 1 and above the liquid outlet trough 26.

[0026] Through the above technical solution, the soft-pack lithium battery is placed on the base 1, the heating platform 36 is started to heat the bottom of the soft-pack lithium battery, the motor 3 is started, and the output shaft of the motor 3 drives the screw 4 to rotate, so that the slider 5 moves downward, drives the support plate 6 to move downward, drives the mounting frame 7 to move downward, drives the support frame 8 and the heat-sealing knife 9 to move downward, and through the provided adjustment component, one side of the heat-sealing knife 9 first contacts the side of the soft-pack lithium battery. As the support frame 8 continues to move downward, under the action of the adjustment component, the heat-sealing knife 9 rotates at the bottom of the support frame 8 and gradually fits the aluminum-plastic film, thereby facilitating the gradual discharge of the aluminum-plastic film wrapped in the aluminum-plastic film while heat sealing. Air is prevented from entering the package by heat sealing. Liquid argon is loaded into the storage cavity 25. As the support plate 6 moves downward, the liquid argon is transmitted outward along the liquid outlet groove 26 through the gas transmission component. When the liquid argon is extracted, it is gasified into argon gas and discharged from the gas transmission pipeline 40. The discharged argon gas is wrapped by the provided protective plate 14 to prevent the argon gas from diffusing rapidly. The air is dispersed by the argon gas accumulated in the protective plate 14, which is convenient for protecting the soft-pack lithium battery in heat sealing, effectively preventing the aluminum-plastic film and the internal materials of the battery from oxidizing with oxygen at high temperature, and further preventing air from entering the heat-sealed aluminum-plastic film.

[0027] Specifically, the gas delivery component includes a cavity 27, which is opened inside the base 1 and located at the top of the liquid outlet groove 26. The inner wall of the cavity 27 is slidably connected with a piston plate 28, and the top of the piston plate 28 is fixedly connected with a third sliding shaft 29. The top of the third sliding shaft 29 passes through the base 1 and is fixedly connected with a limiting plate 31. The outer wall of the third sliding shaft 29 is sleeved with a third spring 30, the top of the third spring 30 is fixedly connected to the limiting plate 31, and the bottom of the third spring 30 is fixedly connected to the base 1. The inner wall of the liquid outlet groove 26 is symmetrically provided with two one-way valves 32 with the cavity 27 as the center. Each one-way valve 32 is opened in the direction of the gas pipeline 40, and the inner wall of the support plate 6 is slidably connected with a push rod 35, and the push rod 35 is located directly above the limit plate 31. The inner wall of the push rod 35 is fixedly connected with a fourth sliding shaft 33, and the fourth sliding shaft 33 is slidably connected to the support plate 6. The outer wall of the fourth sliding shaft 33 is sleeved with a fourth spring 34, the top of the fourth spring 34 is fixedly connected to the support plate 6, and the bottom of the fourth spring 34 is fixedly connected to the push rod 35. The elastic force of the fourth spring 34 is greater than the elastic force of the third spring 30, and the outer wall of the base 1 is provided with a pressure relief valve 50 used in conjunction with the storage chamber 25.

[0028] By means of the above technical solution, when the support plate 6 moves downward, the push rod 35 is driven to move downward. When the bottom of the push rod 35 contacts the limit plate 31, the limit plate 31 is driven downward by the push rod 35, so that the third sliding shaft 29 moves downward, and the piston plate 28 moves downward. As the support plate 6 continues to move downward, the push rod 35 slides inside the support plate 6, pressing the fourth spring 34. When the support plate 6 moves upward, the push rod 35 is gradually reset under the action of the fourth spring 34. As the support plate 6 continues to move upward, the push rod 35 is driven to move upward. When the push rod 3 When the piston plate 28 moves to be separated from the limiting plate 31, the limiting plate 31 is driven to move upward under the action of the third spring 30, so that the piston plate 28 moves upward, and thus reciprocates. With the up and down movement of the support plate 6, the piston plate 28 can be driven to move up and down reciprocatingly. When the piston plate 28 moves upward, under the pulling action of the piston plate 28, the two one-way valves 32 can be used to draw the liquid argon in the storage chamber 25 into the cavity 27. When the piston plate 28 moves downward, under the squeezing action of the piston plate 28, the two one-way valves 32 can be used to squeeze the liquid argon in the cavity 27 along the liquid outlet groove 26.

[0029] Specifically, a corrugated groove 39 is provided inside the liquid outlet groove 26 , a heat conducting plate 37 is provided at the bottom of the heating platform 36 , and a plurality of heat dissipating plates 38 are fixedly connected to the bottom of the heat conducting plate 37 at equal intervals. The heat dissipating plates 38 are located in the depressions of the corrugated groove 39 .

[0030] Through the above technical solution, the waveform groove 39 can delay the flow time of liquid argon in the liquid outlet groove 26. After the heating table 36 is started, it heats the heat conduction plate 37. The heat dissipation plate 38 can release the heat of the heat conduction plate 37 and heat the liquid argon in the waveform groove 39, so that the liquid argon is quickly vaporized. Sufficient argon gas is convenient for dispersing the air near the soft-pack lithium battery.

[0031] Specifically, a cover plate 16 is slidably connected to the outer wall of the mounting frame 7. Two second sliding shafts 15 are symmetrically and fixedly connected to the inner wall of the mounting frame 7. Both second sliding shafts 15 are slidably connected to the cover plate 16. A second spring 17 is sleeved on the outer wall of the second sliding shaft 15. The bottom of the second spring 17 is fixedly connected to the cover plate 16, and the top of the second spring 17 is fixedly connected to the mounting frame 7.

[0032] Through the above technical solution, when the mounting frame 7 moves downward, it drives the cover plate 16 to move downward. When the cover plate 16 abuts against the top of the protection plate 14, the mounting frame 7 continues to move downward. At this time, the cover plate 16 slides outside the second sliding shaft 15, compressing the second spring 17. Under the reaction force of the second spring 17, the cover plate 16 is closely attached to the top of the protection plate 14. Through the cooperation of the cover plate 16 and the protection plate 14, the argon gas discharged from the gas transmission pipeline 40 is prevented from quickly diffusing, and the residence time of the argon gas near the soft-pack lithium battery is extended.

[0033] Specifically, a first fixing ring 41 is fixedly connected to the inner wall of the gas transmission pipeline 40. A second fixing ring 42 is fixedly connected to the inner wall of the gas transmission pipeline 40 on the side far from the first fixing ring 41. Two fifth sliding shafts 43 are symmetrically and slidably connected to the inner wall of the second fixing ring 42. One end of the fifth sliding shaft 43 is fixedly connected to a limit block 44, and the other end of the fifth sliding shaft 43 is fixedly connected to a baffle 46. A fifth spring 45 is sleeved on the outer wall of the fifth sliding shaft 43. One end of the fifth spring 45 is fixedly connected to the baffle 46, and the other end of the fifth spring 45 is fixedly connected to the second fixing ring 42.

[0034] Through the above technical solution, when argon gas enters the gas transmission pipeline 40, under the cooperation of the fifth spring 45 and the baffle 46, the first fixing ring 41 is sealed to prevent the direct discharge of argon gas. As the liquid argon continues to vaporize, the air pressure on one side of the first fixing ring 41 gradually increases. Under the action of the air pressure, the baffle 46 is pushed towards the second fixing ring 42, compressing the fifth spring 45. Thus, the argon gas squeezed in the gas transmission pipeline 40 is quickly discharged, effectively enhancing the impact force of the argon gas and making the flow of the argon gas more concentrated.

[0035] Specifically, two second through grooves 21 are symmetrically formed inside the protective plate 14. A plurality of air outlets 22 are equidistantly formed on the inner wall of the protective plate 14. The air outlets 22 communicate with the second through grooves 21. A second diversion plate 23 is fixedly connected to the inner wall of the second through groove 21 and close to one side of the air outlet 22. The second diversion plate 23 is obliquely installed. Two diversion plates 18 are symmetrically and fixedly connected to the inner wall of the protective plate 14. The positions of the diversion plates 18 are arc-shaped. A first through groove 20 is formed inside the diversion plates 18. One end of the first through groove 20 communicates with the second through groove 21, and the other end of the first through groove 20 extends to the convex surface of the diversion plates 18. A first diversion plate 19 is fixedly connected to the convex surface of the diversion plates 18.

[0036] Through the above technical solution, when argon gas is discharged from the gas transmission pipeline 40, part of the argon gas impacts the first diversion plate 19. Under the guiding action of the first diversion plate 19, part of the argon gas enters the first through groove 20 along the first diversion plate 19. The argon gas entering the first through groove 20 flows into the second through groove 21. When passing through the second diversion plate 23, part of the argon gas flowing in the second through groove 21 flows along the inclined surface of the second diversion plate 23 and is discharged from the air outlet 22. The argon gas discharged from the air outlet 22 impacts different positions of the soft-pack lithium battery, thereby further dissipating the air near the soft-pack lithium battery. And through the previous heating of the argon gas, the temperature of the argon gas is relatively high, which is convenient for preheating the PP layer of the aluminum-plastic film and preventing the PP layer of the aluminum-plastic film from being unevenly heated, affecting the sealing performance of the soft-pack lithium battery after heat sealing.

[0037] Specifically, the adjusting assembly includes a first sliding shaft 10. The first sliding shaft 10 is fixedly installed on the inner wall of the support frame 8. A connecting block 11 is slidably connected to the outer wall of the first sliding shaft 10. A limiting shaft 12 is slidably connected to the inner wall of the mounting frame 7. The bottom of the limiting shaft 12 is rotatably connected to the connecting block 11. A first spring 13 is fixedly connected to the top of the limiting shaft 12. The top of the first spring 13 is fixedly connected to the mounting frame 7.

[0038] Through the above technical solution, through the arranged first spring 13, one side of the heat-sealing knife 9 first contacts one side of the soft-pack lithium battery. As the support frame 8 continues to move downward, under the extrusion action, the heat-sealing knife 9 rotates at the bottom of the support frame 8, pushing the limiting shaft 12 to slide in the mounting frame 7 and compressing the first spring 13.

[0039] Specifically, a diversion block 24 is fixedly connected to the top of the base 1 and between the two diversion plates 18. Both sides of the diversion block 24 are arc-shaped surfaces. Two groups of guide plates 51 are symmetrically and fixedly connected to the bottom of the cover plate 16. The guide plates 51 are all obliquely installed downward.

[0040] Through the above technical solution, the argon gas entering the protective plate 14 is divided by the guide block 24, so that the argon gas forms two flows, thereby facilitating the protection of both sides of the soft-pack lithium battery. The argon gas entering the protective plate 14 is not easy to diffuse outward through the blocking of the guide block 24, thereby extending the residence time of the argon gas near the soft-pack lithium battery. When the argon gas floats upward, it will continue to flow downward on the guiding property of the inclined surface of the guide plate 51, preventing the argon gas from floating upward and being difficult to contact the soft-pack lithium battery.

[0041] Specifically, the inner wall of the mounting frame 7 is symmetrically and slidingly connected with two downward pressing rods 47, the bottoms of the two downward pressing rods 47 are fixedly connected with downward pressing plates 48, the tops of the two downward pressing rods 47 are fixedly connected with sixth springs 49, and the tops of the sixth springs 49 are fixedly connected to the mounting frame 7.

[0042] Through the above technical solution, when the mounting frame 7 moves downward, the two lower pressure rods 47 are driven to move downward, so that the two lower pressure plates 48 move downward. When the lower pressure plate 48 contacts the top of the soft-pack lithium battery, it stops moving downward. As the mounting frame 7 continues to move downward, the sixth spring 49 is compressed. Under the action of the sixth spring 49, the lower pressure plate 48 squeezes the top of the soft-pack lithium battery to prevent the aluminum-plastic film from being blown off the lithium battery during the subsequent argon gas discharge. In addition, through the positioning of the lower pressure plate 48, the soft-pack lithium battery is effectively prevented from moving on the base 1, thereby improving the accuracy of heat sealing.

[0043] A packaging method for a soft-pack lithium battery packaging device, the packaging method is applicable to the above-mentioned soft-pack lithium battery packaging device, and the steps of the packaging method are as follows: S1: placing the soft-pack lithium battery on the base 1 and starting the heating platform 36 to heat the bottom of the soft-pack lithium battery; S2: Start the motor 3 to control the support plate 6 to move downward, so that the heat sealing knife 9 heat-seals the soft-pack lithium battery. One side of the heat sealing knife 9 first contacts the side of the soft-pack lithium battery, and cooperates with the adjustment component to make the heat sealing knife 9 gradually fit the aluminum-plastic film. S3: Liquid argon is loaded into the storage cavity 25, and when the support plate 6 moves downward, the gas delivery assembly is used to discharge the liquid argon in the storage cavity 25, so as to protect the soft-pack lithium battery in heat sealing.

[0044] During use, place the soft-pack lithium battery on the base 1, start the heating table 36 to heat the bottom of the soft-pack lithium battery, load liquid argon inside the stockpiling chamber 25, start the motor 3, the output shaft of the motor 3 drives the lead screw 4 to rotate, causing the slider 5 to move downward, driving the support plate 6 to move downward, causing the mounting bracket 7 to move downward, driving the two pressing rods 47 to move downward, causing the two lower pressing plates 48 to move downward. When the lower pressing plate 48 touches the top of the soft-pack lithium battery, stop moving downward. As the mounting bracket 7 continues to move downward, compress the sixth spring 49. Under the action of the sixth spring 49, the lower pressing plate 48 squeezes the top of the soft-pack lithium battery to prevent the aluminum-plastic film from being blown off the lithium battery during subsequent argon gas discharge. And through the positioning of the lower pressing plate 48, effectively prevent the soft-pack lithium battery from moving on the base 1, improving the accuracy of heat sealing. When the mounting bracket 7 moves downward, it drives the support frame 8 and the heat-sealing knife 9 to move downward. When the support plate 6 moves downward, it drives the ejector rod 35 to move downward. When the bottom of the ejector rod 35 touches the limit plate 31, under the push of the ejector rod 35, drive the limit plate 31 to move downward, causing the third sliding shaft 29 to move downward, driving the piston plate 28 to move downward. Under the extrusion of the piston plate 28 and in cooperation with the two one-way valves 32, the liquid argon in the cavity 27 can be extruded along the liquid outlet groove 26 and enter the corrugated groove 39. When the support plate 6 moves upward, it drives the ejector rod 35 to move upward. When the ejector rod 35 moves to separate from the limit plate 31, under the action of the third spring 30, drive the limit plate 31 to move upward, causing the piston plate 28 to move upward. Under the pulling of the piston plate 28 and in cooperation with the two one-way valves 32, the liquid argon in the stockpiling chamber 25 can be pumped into the cavity 27. By setting the corrugated groove 39, the flow time of the liquid argon in the liquid outlet groove 26 can be delayed. After the heating table 36 is started, it heats the heat-conducting plate 37. Through the set heat-dissipating plate 38, the heat of the heat-conducting plate 37 can be released and the liquid argon in the corrugated groove 39 can be heated, causing the liquid argon to quickly vaporize. When the argon gas enters the gas transmission pipeline 40, under the cooperation of the fifth spring 45 and the baffle 46, the first fixing ring 41 is sealed to prevent the argon gas from being directly discharged. As the liquid argon continuously vaporizes, the air pressure on one side of the first fixing ring 41 gradually increases. Under the action of the air pressure, the argon gas pushes the baffle 46 towards the second fixing ring 42, compressing the fifth spring 45. At this time, the argon gas flows through the gap between the baffle 46 and the gas transmission pipeline 40 towards the second fixing ring 42 and is quickly discharged from the opening of the gas transmission pipeline 40, effectively improving the impact force of the argon gas and making the flow of the argon gas more concentrated. Sufficient argon gas is convenient for dispersing the air near the soft-pack lithium battery. When the mounting bracket 7 moves downward, it drives the cover plate 16 to move downward. When the cover plate 16 abuts against the top of the protection plate 14, the mounting bracket 7 continues to move downward. At this time, the cover plate 16 slides on the second sliding shaft 15, compressing the second spring 17. Under the reaction force of the second spring 17, the cover plate 16 is closely attached to the top of the protection plate 14. Through the cooperation of the cover plate 16 and the protection plate 14,The argon gas discharged from the gas pipeline 40 is prevented from rapidly diffusing, and the residence time of the argon gas near the soft-pack lithium battery is prolonged. When the argon gas is discharged from the gas pipeline 40, part of the argon gas hits the first guide plate 19. Under the guidance of the first guide plate 19, part of the argon gas enters the first through groove 20 along the first guide plate 19. The argon gas entering the first through groove 20 flows into the second through groove 21. When passing through the second guide plate 23, part of the argon gas flowing in the second through groove 21 flows along the inclined surface of the second guide plate 23 and is discharged from the air outlet 22. The argon gas discharged from the air outlet 22 hits different positions of the soft-pack lithium battery, thereby further dissipating the air near the soft-pack lithium battery. In addition, the argon gas temperature is relatively high due to the previous heating of the argon gas, which is convenient for preheating the PP layer of the aluminum-plastic film, and prevents the PP layer of the aluminum-plastic film from being heated unevenly, which affects the sealing of the soft-pack lithium battery after heat sealing. The guide block 24 is provided to The argon gas entering the protective plate 14 is divided, so that the argon gas forms two flows, which is convenient for protecting both sides of the soft-pack lithium battery. The blocking of the guide block 24 is started, so that the argon gas entering the protective plate 14 is not easy to diffuse outward, and the residence time of the argon gas near the soft-pack lithium battery is prolonged. When the argon gas floats upward, it will continue to flow downward under the guidance of the inclined surface of the guide plate 51 to prevent the argon gas from floating upward and being difficult to contact the soft-pack lithium battery. As the mounting frame 7 moves downward, the first spring 13 is set to make one side of the heat sealing knife 9 first contact the side of the soft-pack lithium battery. As the support frame 8 continues to move downward, under the extrusion effect, the heat sealing knife 9 rotates at the bottom of the support frame 8, pushing the limit shaft 12 to slide in the mounting frame 7, pressing the first spring 13, and as the heat sealing knife 9 rotates, the aluminum-plastic film is gradually attached, so that it is convenient to gradually discharge the air wrapped in the aluminum-plastic film while heat sealing, and prevent the outside air from being heat-sealed into the package.

[0045] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. 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. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A soft-pack lithium battery packaging device, characterized in that: The invention comprises a base (1), the top of the base (1) is fixedly connected to a bracket (2), the top of the bracket (2) is fixedly mounted with a motor (3), the output end of the motor (3) extends into the interior of the bracket (2) and is fixedly connected to a lead screw (4), the outer wall of the lead screw (4) is connected to a slider (5) via a lead screw nut pair, the slider (5) is slidably connected to the bracket (2), one side of the slider (5) is fixedly connected to a support plate (6), the bottom of the support plate (6) is fixedly connected to a mounting frame (7), the bottom of the mounting frame (7) is rotatably connected to a support frame (8), the bottom of the support frame (8) is fixedly connected to a heat sealing knife (9), and the mounting frame (8) is fixedly connected to a support plate (6). An adjusting component is arranged inside the mounting frame (7); a material storage cavity (25) is arranged inside the base (1); a liquid outlet groove (26) is arranged inside the base (1) and located above the material storage cavity (25); one end of the liquid outlet groove (26) extends into the material storage cavity (25); a gas pipeline (40) is fixedly connected to the top of the base (1); the bottom of the gas pipeline (40) extends into the liquid outlet groove (26); a gas supply component is arranged inside the base (1); a protective plate (14) is fixedly connected to the top of the base (1); and a heating platform (36) is arranged inside the base (1) and located above the liquid outlet groove (26).

2. A soft-pack lithium battery packaging device according to claim 1, characterized in that: The gas delivery assembly comprises a cavity (27), the cavity (27) being opened inside the base (1) and located at the top of the liquid outlet groove (26), the inner wall of the cavity (27) being slidably connected to a piston plate (28), the top of the piston plate (28) being fixedly connected to a third sliding shaft (29), the top of the third sliding shaft (29) passing through the base (1) and being fixedly connected to a limit plate (31), the outer wall of the third sliding shaft (29) being sleeved with a third spring (30), the top of the third spring (30) being fixedly connected to the limit plate (31), the bottom of the third spring (30) being fixedly connected to the base (1), and the inner wall of the liquid outlet groove (26) being symmetrically provided with two one-way valves (32) with the cavity (27) as the center, the two one-way valves (32) being arranged on the inner wall of the liquid outlet groove (26) and the two one-way valves (32) being fixedly connected to the limit plate (31 ... three one-way valves (32) being fixedly connected to the limit plate (31) and the three one-way valves (32) being fixedly connected to the limit plate (31) and the three one-way valves (32) being fixedly connected to the limit plate (31) and the three one-way valves (32) being fixedly connected to the limit plate (3 The valves (32) are all opened in the direction of the gas transmission pipeline (40); the inner wall of the support plate (6) is slidably connected to a push rod (35); the push rod (35) is located directly above the limit plate (31); the inner wall of the push rod (35) is fixedly connected to a fourth sliding shaft (33); the fourth sliding shaft (33) is slidably connected to the support plate (6); the outer wall of the fourth sliding shaft (33) is sleeved with a fourth spring (34); the top of the fourth spring (34) is fixedly connected to the support plate (6); the bottom of the fourth spring (34) is fixedly connected to the push rod (35); the elastic force of the fourth spring (34) is greater than the elastic force of the third spring (30); and the outer wall of the base (1) is provided with a pressure relief valve (50) used in conjunction with the storage chamber (25).

3. A soft-pack lithium battery packaging device according to claim 2, characterized in that: A corrugated groove (39) is provided inside the liquid outlet groove (26), a heat conducting plate (37) is provided at the bottom of the heating platform (36), a plurality of heat dissipation plates (38) are fixedly connected to the bottom of the heat conducting plate (37) at equal intervals, and the heat dissipation plates (38) are located in the depression of the corrugated groove (39).

4. A soft-pack lithium battery packaging device according to claim 3, characterized in that: The outer wall of the mounting frame (7) is slidably connected to a cover plate (16), and the inner wall of the mounting frame (7) is symmetrically fixedly connected to two second sliding shafts (15), both of which are slidably connected to the cover plate (16). The outer wall of the second sliding shaft (15) is sleeved with a second spring (17), the bottom of the second spring (17) is fixedly connected to the cover plate (16), and the top of the second spring (17) is fixedly connected to the mounting frame (7).

5. A soft-pack lithium battery packaging device according to claim 4, characterized in that: The inner wall of the gas transmission pipeline (40) is fixedly connected to a first fixing ring (41), and the inner wall of the gas transmission pipeline (40) is fixedly connected to a side thereof away from the first fixing ring (41), and the inner wall of the second fixing ring (42) is symmetrically slidably connected to two fifth sliding shafts (43), one end of the fifth sliding shaft (43) is fixedly connected to a limiting block (44), and the other end of the fifth sliding shaft (43) is fixedly connected to a baffle (46), and the outer wall of the fifth sliding shaft (43) is sleeved with a fifth spring (45), one end of the fifth spring (45) is fixedly connected to the baffle (46), and the other end of the fifth spring (45) is fixedly connected to the second fixing ring (42).

6. A soft-pack lithium battery packaging device according to claim 5, characterized in that: Two second through slots (21) are symmetrically formed inside the protective plate (14); a plurality of air outlets (22) are equidistantly formed on the inner wall of the protective plate (14); the air outlets (22) are communicated with the second through slots (21); a second guide plate (23) is fixedly connected to the inner wall of the second through slot (21) and on a side close to the air outlet (22); the second guide plate (23) is installed at an angle; two guide plates (18) are symmetrically fixedly connected to the inner wall of the protective plate (14); the guide plates (18) are in an arc shape; a first through slot (20) is formed inside the guide plate (18); one end of the first through slot (20) is communicated with the second through slot (21); the other end of the first through slot (20) extends to the outer convex surface of the guide plate (18); the outer convex surface of the guide plate (18) is fixedly connected to the first guide plate (19).

7. A soft-pack lithium battery packaging device according to claim 6, characterized in that: The adjustment assembly comprises a first sliding shaft (10), the first sliding shaft (10) is fixedly mounted on the inner wall of the support frame (8), the outer wall of the first sliding shaft (10) is slidably connected to a connecting block (11), the inner wall of the mounting frame (7) is slidably connected to a limiting shaft (12), the bottom of the limiting shaft (12) is rotatably connected to the connecting block (11), the top of the limiting shaft (12) is fixedly connected to a first spring (13), and the top of the first spring (13) is fixedly connected to the mounting frame (7).

8. The soft-pack lithium battery packaging device according to claim 7, characterized in that: A guide block (24) is fixedly connected to the top of the base (1) and located between the two guide plates (18), and both sides of the guide block (24) are arranged as arc-shaped surfaces. Two groups of guide plates (51) are symmetrically fixedly connected to the bottom of the cover plate (16), and the guide plates (51) are all installed in a downward tilted manner.

9. The soft-pack lithium battery packaging device according to claim 8, characterized in that: The inner wall of the mounting frame (7) is symmetrically and slidably connected to two pressing rods (47), the bottoms of the two pressing rods (47) are fixedly connected to a pressing plate (48), the tops of the two pressing rods (47) are fixedly connected to a sixth spring (49), and the top of the sixth spring (49) is fixedly connected to the mounting frame (7).

10. A packaging method for a soft-pack lithium battery packaging device, the packaging method being applicable to the soft-pack lithium battery packaging device according to claim 9, characterized in that: The steps of the packaging method are as follows: S1: placing a soft-pack lithium battery on a base (1), and starting a heating platform (36) to heat the bottom of the soft-pack lithium battery; S2: starting the motor (3) to control the support plate (6) to move downward, so that the heat sealing knife (9) heat-seals the soft-pack lithium battery, one side of the heat sealing knife (9) first contacts the side of the soft-pack lithium battery, and the adjustment component is cooperated to make the heat sealing knife (9) gradually fit the aluminum-plastic film; S3: Liquid argon is loaded into the storage cavity (25), and when the support plate (6) moves downward, the gas delivery assembly is used to discharge the liquid argon in the storage cavity (25), thereby protecting the soft-pack lithium battery in heat sealing.

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