A soft-pack lithium battery aluminum-plastic film hot and cold packaging machine

Abstract

The present invention discloses a hot and cold packaging machine for aluminum-plastic film for soft-pack lithium batteries, comprising a head mounting frame, a hot-sealing head assembly, a cold-sealing head assembly, and a negative-pressure placement platform for soft-pack batteries with negative pressure for adsorbing aluminum-plastic film; the hot-sealing head assembly and the cold-sealing head assembly are arranged adjacent to each other, the hot-sealing head assembly comprising an upper hot-sealing head assembly and a lower hot-sealing head assembly positioned opposite each other, and the cold-sealing head assembly comprising an upper cold-sealing head assembly and a lower cold-sealing head assembly positioned opposite each other; a lifting structure is installed on the upper portion of the head mounting frame, the upper hot-sealing head assembly and the upper cold-sealing head assembly are mounted on the lifting structure and controlled by the lifting structure, the lower hot-sealing head assembly and the lower cold-sealing head assembly are mounted on the lower portion of the head mounting frame, and a packaging area is formed between the upper and lower head assemblies. This device can avoid poor packaging thickness uniformity and low pass rate caused by prolonged heating of the hot-sealing head or insufficient strength of the mounting base, and can significantly improve the stability of soft-pack lithium battery packaging and improve the packaging pass rate.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack lithium battery packaging equipment, and in particular to a soft-pack lithium battery aluminum-plastic film hot and cold packaging machine. Background Art

[0002] In the packaging and manufacturing of soft-pack lithium batteries, the quality of the cell packaging process has a great impact on the quality and life of the lithium battery. In the packaging process of lithium batteries, the battery shell is often made of a thin aluminum-plastic film. During the packaging process, the aluminum-plastic film is often affected by the flatness of the heat seal head, the uniformity of the head surface temperature, and the surface finish of the head. At the same time, the heat seal head is prone to deformation when the heating time is long or the strength of the head bottom mounting seat is insufficient. As a result, bubbles and creases appear in the aluminum-plastic film seal, resulting in poor airtightness of the aluminum-plastic film edge seal, and the package may appear virtual seal, uneven seal, bubbles in the seal, etc. In the production process of the head, the structural design requirements of the head are extremely strict and the processing process is relatively complex. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a hot and cold packaging machine for soft-pack lithium battery aluminum-plastic film. The device can solve the problems of the heat-sealing head being deformed due to heat when the heating time is long or the strength of the heat-sealing head mounting base is insufficient, resulting in the packaging appearing empty, uneven, and having bubbles in the seal.

[0004] The present invention is achieved through the following technical solutions: a soft-pack lithium battery aluminum-plastic film hot and cold packaging machine, comprising a head mounting frame, a heat sealing head assembly, a cold sealing head assembly and a soft-pack battery negative pressure placement platform with negative pressure and used to adsorb the aluminum-plastic film; the heat sealing head assembly is arranged adjacent to the cold sealing head assembly, the heat sealing head assembly comprises an upper heat sealing head assembly and a lower heat sealing head assembly that are positioned opposite to each other, and the cold sealing head assembly comprises an upper cold sealing head assembly and a lower cold head assembly that are positioned opposite to each other; a lifting structure is installed on the upper part of the head mounting frame, the upper heat sealing head assembly and the upper cold sealing head assembly are mounted on the lifting structure and are controlled to rise and fall by the same, the lower heat sealing head assembly and the lower cold head assembly are mounted on the lower part of the head mounting frame, and a packaging area is formed between the upper and lower head assemblies; the soft-pack battery negative pressure placement platform is located on one side of the head mounting frame, and the soft-pack battery negative pressure placement platform is provided with an extendable platform for placing soft-pack lithium batteries and allowing them to be extended into or out of the packaging area.

[0005] In this device, the hot sealing head assembly and the cold sealing head assembly are arranged adjacent to each other, which can facilitate the soft-pack battery aluminum-plastic film to be quickly transferred to the cold sealing head position after preheating the hot sealing head, and to perform cold pressing and shaping before the PP layer of the aluminum-plastic film solidifies, ensuring that the aluminum-plastic film seal has a better shape and uniform seal thickness.

[0006] The head mounting frame is composed of a mounting frame bottom plate, an upper mounting base, a rib plate, a rear back plate and an upper top plate to form a C-shaped structure; the upper mounting base is mounted on the mounting frame bottom plate, and the rear back plate is vertically mounted on the upper mounting base; the rib plate is provided with two pieces, respectively mounted on both sides of the upper mounting base, and the rear back plate is clamped and fixed between the two; the upper top plate is mounted on the rib plate and the top of the rear back plate; the lifting structure includes a first lifting structure and a second lifting structure; the first lifting structure includes a slide rail, a sliding mounting seat and a first cylinder; the slide rail is vertically mounted on the rear back plate, the sliding mounting seat is mounted on the slide rail and can slide along it, The upper hot sealing head assembly is mounted on the sliding mounting seat; the first cylinder is mounted on the upper side of the upper top plate, and the telescopic rod of the first cylinder passes through the upper top plate and is connected to the sliding mounting seat; the second lifting structure includes a second cylinder, a guide cylinder and a guide rod; the second cylinder is mounted on the upper side of the upper top plate, and the telescopic rod of the second cylinder passes through the upper top plate and is fixed to the upper cold sealing head assembly, the guide cylinder is mounted on the upper top plate, the lower end of the guide rod is fixed to the upper cold sealing head assembly, and the upper end thereof passes through the upper top plate and is inserted into the guide cylinder. Four guide rods are provided, respectively located at the four corners of the top of the upper cold sealing head assembly, and the number of the guide cylinders matches the number of the guide rods. The arrangement of the two sets of cylinders enables the upper cold sealing head assembly and the upper hot sealing head assembly to have separate controllable functions and realize separate operation.

[0007] The lower heat sealing head assembly includes a lower head mounting seat, an upper heat insulation pad, an upper heating seat and an upper lower heat sealing knife stacked in sequence from bottom to top; the lower head mounting seat is mounted on the bottom plate of the mounting frame, and the upper lower heat sealing knife is connected to the upper heating seat by a fastening screw; a heating rod is installed in the upper heating seat; the upper heat sealing head assembly includes an upper head mounting seat, a lower heat insulation pad, a lower heating seat and a lower upper heat sealing knife stacked in sequence from top to bottom; the upper head mounting seat is mounted on the sliding mounting seat, and the lower upper heat sealing knife is connected to the lower heating seat by a fastening screw; a heating rod is installed in the lower heating seat.

[0008] The lower cold sealing head assembly includes a lower head base and a lower cold sealing knife stacked in sequence from bottom to top; the lower head base is installed on the bottom plate of the mounting frame, and the lower cold sealing knife is connected to the lower head base by a fastening screw; a cold water pipe for circulation operation is installed in the lower cold sealing knife; the upper cold sealing head assembly includes an upper head base and an upper cold sealing knife stacked from top to bottom; the upper head base is installed on the telescopic rod of the second cylinder, and the lower end of the guide rod is fixed on the upper head base; the upper cold sealing knife is connected to the upper head base by a fastening screw; a cold water pipe for circulation operation is installed in the upper cold sealing knife.

[0009] The heating rod is a temperature-uniform heating rod.

[0010] The heating rod in the upper heating block is 22 cm longer than the upper heating block, and has 10 mm non-heating ends at the front and rear ends. The heating rod in the lower heating block is 22 cm longer than the upper heating block, and has 10 mm non-heating ends at the front and rear ends. The non-heating ends prevent the two ends from affecting the head temperature.

[0011] The upper and lower insulation pads are both made of fiberglass with a thermal conductivity of 0.216 W / cm·K. The provision of the insulation pads can effectively block the influence of the heating seat temperature on the head mounting seat.

[0012] The height of the lower hot sealing head assembly is higher than that of the lower cold sealing head assembly. The height difference between the two lower sealing head assemblies can ensure that the soft-pack lithium battery will not interfere with the lower cold sealing head assembly during the hot air process.

[0013] The soft-pack battery negative pressure placement table includes a negative pressure suction table, a lower suction table adapter plate, a slide rail mounting plate, a guide rod, a slide rail moving plate, a lower guide rail table, a linear motor, a suction table bottom plate, a guide rail and a third cylinder; the lower guide rail table is provided with two, respectively arranged on opposite sides of the suction table bottom plate; the upper part of the lower guide rail table is provided with a guide rail, the slide rail moving plate is installed on the guide rail and can slide along it; the two ends of the slide rail mounting plate are respectively connected to the slide rail moving plate by screws; the linear motor is installed on the suction table bottom plate, and the linear motor is connected to the slide rail mounting plate; the slide rail mounting plate is installed with a linear bearing, the lower end of the guide rod is installed on the suction table bottom plate, and the upper end of the guide rod passes through the linear bearing, the guide rod is provided with four, and the number of the linear bearings is the same as that of the guide rod. The number of the longitudinal rods is the same; the third cylinder is vertically mounted on the lower side of the slide rail mounting plate, and its telescopic rod passes through the slide rail mounting plate and is connected to the lower suction platform adapter plate through a floating joint; the negative pressure suction platform is mounted on the upper side of the lower suction platform adapter plate, and the negative pressure suction platform and the lower suction platform adapter plate form the extendable platform; a limit stop is also installed on the bottom plate of the suction platform, and the limit stop is located close to the side of the head mounting frame, and a limit bolt that can be rotatably adjusted in height is vertically installed on the top of the limit stop; the length of the negative pressure suction platform is longer than the length of the lower suction platform adapter plate, and the part of the negative pressure suction platform that exceeds the lower suction platform adapter plate is located close to the side of the head mounting frame, and the limit bolt of the limit stop forms the lower limit of the vertical movement of the negative pressure suction platform.

[0014] The battery placement area of the negative pressure suction table has nine holes, evenly distributed in three rows, with three holes per row. The center row of holes is for battery suction, and the other two rows are for air bag suction. The diameter of the air bag suction holes is 2mm. The negative pressure suction table also has six crisscrossing and interconnected long strips of holes, with three holes in each horizontal and vertical row. All nine holes are connected to these long strips of holes, each with a diameter of 3mm. These long strips are connected to an external vacuum negative pressure device. The connection between the long strips and suction holes in this device ensures uniform negative pressure suction.

[0015] Compared with the existing technology, the advantages of the present invention are: by adding a cold sealing head device to improve the poor seal thickness uniformity, false seal, wrinkles and airway phenomena that occur in the packaging process of soft-pack lithium batteries, it avoids the poor packaging thickness uniformity and low pass rate caused by long-term heating of the hot sealing head or insufficient strength of the mounting base, and can significantly improve the stability of soft-pack lithium battery packaging and improve the packaging pass rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 This is a structural diagram of the cooperation between the head mounting frame and the head assembly according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic structural diagram of a head mounting frame according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic structural diagram of a negative pressure placement table for soft-pack batteries according to an embodiment of the present invention;

[0020] Figure 5 This is a structural diagram of the soft-pack battery negative pressure placement table after removing the negative pressure suction table and the lower suction table adapter plate according to an embodiment of the present invention;

[0021] Figure 6 Schematic diagram of the structure of the negative pressure suction table according to an embodiment of the present invention.

[0022] 1. The meaning of the reference numerals in the figure: 100, cold sealing head assembly; 110, lower cold sealing head assembly; 111, lower head base; 112, lower cold sealing knife; 120, upper cold sealing head assembly; 121, upper head base; 122, upper cold sealing knife; 130, second cylinder; 141, guide rod; 200, hot sealing head assembly; 210, lower hot sealing head assembly; 211, lower head mounting seat; 212, upper thermal insulation pad; 213, upper heating seat; 214, upper lower thermal sealing knife; 220, upper hot sealing head assembly; 221, upper head mounting seat; 222, lower thermal insulation pad; 223, lower heating seat; 224, lower upper thermal sealing knife; 240, first cylinder; 300, head mounting bracket; 3 11. Mounting frame base plate; 312. Right rib plate; 313. Left rib plate; 314. Upper top plate; 315. Rear back plate; 316. Sliding mounting seat; 317. Slide rail; 318. Upper mounting base; 319. Guide cylinder; 400. Negative pressure placement table for soft-pack batteries; 411. Negative pressure suction table; 412. Lower suction table adapter plate; 413. Slide rail mounting plate; 414. Guide rod; 415. Slide rail moving plate; 416. Lower guide rail table; 417. Linear motor; 418. Suction table base plate; 419. Limit block; 420. Third cylinder; 421. Guide rail; 422. Battery position adsorption hole; 423. Air bag adsorption hole; 424. Long strip hole; 500. Soft-pack lithium battery. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example

[0025] See Figures 1 to 6 , is a soft-pack lithium battery aluminum-plastic film hot and cold packaging machine, including a head mounting frame 300, a hot sealing head assembly 200, a cold sealing head assembly 100 and a soft-pack battery negative pressure placement table 400 with negative pressure for adsorbing the aluminum-plastic film; the hot sealing head assembly 200 is arranged adjacent to the cold sealing head assembly 100, the hot sealing head assembly 200 includes an upper hot sealing head assembly 220 and a lower hot sealing head assembly 210 in opposite positions, and the cold sealing head assembly 100 includes an upper cold sealing head assembly 120 and a lower cold sealing head assembly 110 in opposite positions; the head mounting frame 300, a hot sealing head assembly 200, a cold sealing head assembly 100 and a ... A lifting structure is installed on the upper part of the frame 300, the upper hot head assembly 220 and the upper cold head assembly 120 are installed on the lifting structure and are controlled by it, the lower hot head assembly 210 and the lower cold head assembly 110 are installed at the lower part of the head mounting frame 300, and a packaging area is formed between the upper and lower head assemblies; the soft-pack battery negative pressure placement platform 400 is located on one side of the head mounting frame 300, and the soft-pack battery negative pressure placement platform 400 is provided with an extendable platform for placing the soft-pack lithium battery 500 and can extend it into or out of the packaging area.

[0026] In this device, the hot-sealing head assembly 200 is positioned adjacent to the cold-sealing head assembly 100. This facilitates the rapid transfer of the soft-pack battery aluminum-plastic film to the cold-sealing head after preheating the hot-sealing head. Cold pressing and shaping are performed before the PP layer of the aluminum-plastic film solidifies, ensuring a well-defined seal and uniform thickness. In this embodiment, the soft-pack lithium battery 500 refers to an assembly of aluminum-plastic film surrounding a battery cell.

[0027] The head mounting frame 300 is composed of a mounting frame bottom plate 311, an upper mounting base 318, a rib plate, a rear back plate 315 and an upper top plate 314 to form a C-shaped structure; the upper mounting base 318 is mounted on the mounting frame bottom plate 311, and the rear back plate 315 is vertically mounted on the upper mounting base 318; there are two rib plates, namely the left rib plate 313 and the right rib plate 312, which are respectively mounted on the left and right sides of the upper mounting base 318 and clamp the rear back plate 315 between the two; the upper top plate 314 is mounted on the top of the rib plate and the rear back plate 315; the lifting structure includes a first lifting structure and a second lifting structure; the first lifting structure includes a slide rail 317, a sliding mounting seat 316 and a first cylinder 240; the slide rail 317 is vertically mounted on the rear back plate 315, and the sliding mounting seat 316 is mounted on the slide rail 3 17 and can slide along it, the upper hot sealing head assembly 220 is mounted on the sliding mounting seat 316; the first cylinder 240 is mounted on the upper side of the upper top plate 314, and the telescopic rod of the first cylinder 240 passes through the upper top plate 314 and is connected to the sliding mounting seat 316; the second lifting structure includes the second cylinder 130, a guide cylinder 319 and a guide rod 141; the second cylinder 130 is mounted on the upper side of the upper top plate 314, and the telescopic rod of the second cylinder 130 passes through the upper top plate 314 and is fixed to the upper cold sealing head assembly 120, the guide cylinder 319 is mounted on the upper top plate 314, the lower end of the guide rod 141 is fixed to the upper cold sealing head assembly 120, and its upper end passes through the upper top plate 314 and is arranged in the guide cylinder 319. There are four guide rods 141, which are respectively located at the four corners of the top of the upper cold sealing head assembly 120, and the number of guide cylinders 319 matches the number of guide rods 141. The two sets of cylinders provide the upper cold end assembly 120 and the upper hot end assembly 220 with independent controllable functions and enable independent operation. The sliding mounting seat 316 is provided on the slide rail 317 to ensure the walking flatness of the sliding mounting seat 316 and complete the up and down movement.

[0028] The lower heat sealing head assembly 210 includes a lower head mounting seat 211, an upper heat insulation pad 212, an upper heating seat 213 and an upper lower heat sealing knife 214 stacked in sequence from bottom to top; the lower head mounting seat 211 is installed on the bottom plate 311 of the mounting frame, and the upper lower heat sealing knife 214 is connected to the upper heating seat 213 by fastening screws; a heating rod is installed in the upper heating seat 213; the upper heat sealing head assembly 220 includes an upper head mounting seat 221, a lower heat insulation pad 222, a lower heating seat 223 and a lower upper heat sealing knife 224 stacked in sequence from top to bottom; the upper head mounting seat 221 is installed on the sliding mounting seat 316, and the lower upper heat sealing knife 224 is connected to the lower heating seat 223 by fastening screws; a heating rod is installed in the lower heating seat 223. The lower head mounting seat 211 is installed on the mounting frame bottom plate 311, which can effectively improve the stability during the packaging process and ensure the fit of the upper lower heat sealing knife 214 and the lower upper heat sealing knife 224 during operation; the two heat sealing knives are connected to the two heating seats by fastening screws. They are two independent parts connected by fastening screws, which can facilitate the subsequent disassembly of the heat sealing knife for grinding and maintenance.

[0029] The lower cold head assembly 110 includes a lower head base 111 and a lower cold sealing knife 112 stacked in sequence from bottom to top; the lower head base 111 is installed on the bottom plate 311 of the mounting frame, and the lower cold sealing knife 112 is connected to the lower head base 111 by fastening screws; a cold water pipe for circulation operation is installed in the lower cold sealing knife 112; the upper cold head assembly 120 includes an upper head base 121 and an upper cold sealing knife 122 stacked in sequence from top to bottom; the upper head base 121 is installed on the telescopic rod of the second cylinder 130, and the lower end of the guide rod 141 is fixed on the upper head base 121; the upper cold sealing knife 122 is connected to the upper head base 121 by fastening screws; a cold water pipe for circulation operation is installed in the upper cold sealing knife 122. The lower cold sealing blade 112 and the upper cold sealing blade 122 are installed with circulating cold water pipes to control the temperature of the sealing blades so that the upper and lower sealing blades will not deform due to heat, thereby ensuring the flatness of the working surfaces of the lower cold sealing blade 112 and the upper cold sealing blade 122. The lower cold sealing head assembly 110 is fixedly mounted on the mounting frame bottom plate 311 via the lower head base 111. This fixed structure can effectively improve the stability during the packaging process and ensure the fit of the upper and lower cold sealing blades 122 and 112 during operation. The cold sealing blade is connected to the head base by fastening screws. As two independent parts are connected by fastening screws, it is convenient for the subsequent disassembly of the cold sealing blade for repair and maintenance.

[0030] The heating rod is a temperature-uniform heating rod.

[0031] The heating rod in the upper heating seat 213 is 22 cm longer than the upper heating seat 213, and has 10 mm non-heating ends at the front and rear ends. The heating rod in the lower heating seat 223 is 22 cm longer than the upper heating seat 213, and has 10 mm non-heating ends at the front and rear ends. The non-heating ends can prevent the two ends from affecting the head temperature.

[0032] The upper insulation pad 212 and the lower insulation pad 222 are both made of glass fiber board with a thermal conductivity of 0.216 W / cm·K. The provision of the insulation pads can effectively block the influence of the heating seat temperature on the head mounting seat.

[0033] The height of the lower hot sealing head assembly 210 is higher than that of the lower cold sealing head assembly 110. The height difference between the two lower sealing head assemblies ensures that the soft-pack lithium battery 500 will not interfere with the lower cold sealing head assembly 110 during the hot air process.

[0034] The soft-pack battery negative pressure placement table 400 includes a negative pressure suction table 411, a lower suction table adapter plate 412, a slide rail mounting plate 413, a guide rod 414, a slide rail moving plate 415, a lower guide rail table 416, a linear motor 417, a suction table bottom plate 418, a guide rail 421 and a third cylinder 420; there are two lower guide rail tables 416, which are respectively arranged on opposite sides of the suction table bottom plate 418; a guide rail 421 is provided on the upper part of the lower guide rail table 416, The slide rail moving plate 415 is installed on the guide rail 421 and can slide along it; the two ends of the slide rail mounting plate 413 are connected to the slide rail moving plate 415 by screws; the linear motor 417 is installed on the suction table bottom plate 418, and the linear motor 417 is connected to the slide rail mounting plate 413; the slide rail mounting plate 413 is installed with a linear bearing, the lower end of the guide rod 414 is installed on the suction table bottom plate 418, and its upper end passes through the linear bearing. The guide rod 414 has four The number of linear bearings is the same as the number of guide rods 414; the third cylinder 420 is vertically mounted on the lower side of the slide rail mounting plate 413, and its telescopic rod passes through the slide rail mounting plate 413 and is connected to the lower suction platform adapter plate 412 through a floating joint; the negative pressure suction platform 411 is mounted on the upper side of the lower suction platform adapter plate 412, and the negative pressure suction platform 411 and the lower suction platform adapter plate 412 form an extendable platform; a limit stop 419 is also installed on the suction platform bottom plate 418, and the limit stop 419 is located on the side close to the head mounting frame 300, and a limit bolt that can be rotated and adjusted in height is vertically installed on the top of the limit stop 419; the length of the negative pressure suction platform 411 is longer than the length of the lower suction platform adapter plate 412, and the part of the negative pressure suction platform 411 that exceeds the lower suction platform adapter plate 412 is located on the side close to the head mounting frame 300, and the limit bolt of the limit stop 419 forms the lower limit of the vertical movement of the negative pressure suction platform 411. The third cylinder 420 drives the lower suction table adapter plate 412 to move up and down along the guide rod 414 through the linear bearing, so that the suction table adapter plate 412 drives the negative pressure suction table 411 to complete the vertical movement. The limit block 419 is set to limit the vertical movement of the negative pressure suction table. When the third cylinder 420 drives the negative pressure suction table to move vertically, the bottom of the negative pressure suction table touches the limit block 419 and stops. It can limit the lower limit of the movement of the negative pressure table 411 by adjusting the limit bolt on the top. The linear motor 417 is an existing device, so there is no need to carry out a specific analysis. In this application, the linear motor 417 is provided with three working positions, one is the working waiting position, the second is the hot sealing position, and the third is the cold sealing and shaping position.

[0035] The battery placement area of the negative pressure suction table 411 has nine holes, evenly distributed in three rows, with three holes in each row. The center row of holes is the battery position suction hole 422, and the other two rows are the air bag suction holes 423. The diameter of the air bag suction holes 423 is 2mm. The negative pressure suction table 411 also has six crisscrossing and connected long strip holes 424, with three long strip holes 424 in each horizontal and vertical row. All nine holes are connected to the long strip holes 424, and the diameter of the long strip holes 424 is 3mm. The long strip holes 424 are connected to the external vacuum negative pressure device. The long strip holes 424 of this device are connected to the suction holes, which can ensure uniform negative pressure suction force, generate equal suction force at each point of the soft-pack lithium battery 500, and ensure that the aluminum-plastic film wrapped around the soft-pack lithium battery 500 has a good shape during the transfer and packaging process. In this embodiment, the external vacuum negative pressure device connected to the long strip holes 424 is an existing device and does not require a detailed structural analysis.

[0036] The operation process of this embodiment is as follows: first, the soft-pack lithium battery 500 is placed on the battery placement negative pressure suction table 411. The third cylinder 420 (lifting cylinder) of the negative pressure suction table 411 lifts the soft-pack lithium battery 500 to a height higher than the lower head position. The linear motor 417 delivers the soft-pack lithium battery 500 to the hot sealing head assembly 200. The upper hot sealing head assembly 220 presses down to pre-seal the aluminum-plastic film of the soft-pack lithium battery 500. The linear motor 417 then drives the soft-pack lithium battery 500 to the cold sealing head assembly 100. The upper cold sealing head assembly 120 then presses down to perform cold pressure shaping on the hot seal of the aluminum-plastic film. This can prevent the heat sealing knife from deforming due to long-term temperature heating, resulting in poor flatness of the sealing knife working surface, which can easily cause wrinkles, false seals, and poor thickness uniformity in the aluminum-plastic film seal. At the same time, the poor finish of the sealing knife working surface can cause adhesion to the aluminum-plastic film, resulting in the upper and lower heat sealing knives adhering to the aluminum-plastic film. After the upper sealing knife is lifted after the operation, the aluminum-plastic film is lifted up together, thereby changing the original heat seal thickness of the aluminum-plastic film. A cold sealing head assembly 100 is provided. After the heat sealing of the aluminum-plastic film is completed, the cold sealing head assembly 100 is reshaped and the aluminum-plastic film seal is pressed. This can prevent the heat sealing knife from changing its shape and the influence of foreign matter on the aluminum-plastic film seal. At the same time, it can reduce the processing cost of the heat sealing head, reduce the flatness requirements of the heat sealing knife, and reduce the strength requirements of the heat sealing knife base.

[0037] In this embodiment, the upper sealing head is driven by a cylinder to move up and down to achieve the packaging effect, and the cold sealing head is passed through water for circulating cooling; the head mounting frame 300 is a mounting bracket for the cold sealing head assembly 100 and the hot sealing head assembly 200, which is used to support the cold sealing head assembly 100 and the hot sealing head assembly 200. At the same time, a slide rail 317 is installed to assist the movement of the upper hot sealing head assembly 220 of the hot sealing head, and a guide rod 141 is installed to assist the movement of the upper head assembly of the cold sealing head; the battery negative pressure placement table is used to place the soft-pack lithium battery 500. The placement table has uniform holes and negative pressure adsorption to ensure that the battery will not move during the packaging and transfer process. The cold sealing head assembly 100 and the hot sealing head assembly 200 are used to package the soft-pack lithium battery. The operation process is to first use the hot sealing head to heat the PP layer of the aluminum-plastic film of the soft-pack lithium battery 500 to make it molten, and then use the cold sealing head to punch the aluminum-plastic film heat seal to allow the PP layer to cool and shape, so as to effectively improve the packaging qualification rate.

[0038] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. A hot and cold packaging machine for soft-pack lithium batteries with aluminum-plastic film, characterized by: The invention relates to a soft-pack battery negative pressure placement platform, wherein the hot sealing head assembly is arranged adjacent to the cold sealing head assembly, and the hot sealing head assembly comprises an upper hot sealing head assembly and a lower hot sealing head assembly which are positioned opposite to each other, and the cold sealing head assembly comprises an upper cold sealing head assembly and a lower cold sealing head assembly which are positioned opposite to each other; a lifting structure is installed on the upper part of the head mounting frame, and the upper hot sealing head assembly and the upper cold sealing head assembly are mounted on the lifting structure and are controlled to rise and fall by the lifting structure, and the lower hot sealing head assembly and the lower cold sealing head assembly are mounted on the lower part of the head mounting frame, and a packaging area is formed between the upper and lower head assemblies; the soft-pack battery negative pressure placement platform is located on one side of the head mounting frame, The soft-pack battery negative pressure placement table is provided with an extendable platform for placing soft-pack lithium batteries and extending them into or out of the packaging area; the head mounting frame is composed of a mounting frame bottom plate, an upper mounting base, a rib plate, a rear back plate and an upper top plate to form a C-shaped structure; the upper mounting base is mounted on the mounting frame bottom plate, and the rear back plate is vertically mounted on the upper mounting base; the rib plate is provided with two pieces, respectively mounted on both sides of the upper mounting base, and the rear back plate is clamped and fixed between the two; the upper top plate is mounted on the rib plate and the top of the rear back plate; the lifting structure includes a first lifting structure and a second lifting structure; the first lifting structure includes a slide rail, a sliding mounting seat and a first cylinder; the slide rail vertical The cam is mounted on the upper side of the upper plate, and the telescopic rod of the first cylinder passes through the upper plate and is connected to the sliding mounting seat; the second lifting structure includes a second cylinder, a guide cylinder and a guide rod; the second cylinder is mounted on the upper side of the upper plate, and the telescopic rod of the second cylinder passes through the upper plate and is fixed to the upper cold sealing head assembly, the guide cylinder is mounted on the upper plate, the lower end of the guide rod is fixed to the upper cold sealing head assembly, and the upper end thereof passes through the upper plate and is arranged in the guide cylinder, and the guide rod is provided with four The number of guide cylinders and guide rods at the four top corners of the upper cold head assembly matches the number of guide rods; the lower cold head assembly includes a lower head base and a lower cold sealing knife stacked in sequence from bottom to top; the lower head base is installed on the bottom plate of the mounting frame, and the lower cold sealing knife is connected to the lower head base by a fastening screw; a cold water pipe for circulating operation is installed in the lower cold sealing knife; the upper cold head assembly includes an upper head base and an upper cold sealing knife stacked from top to bottom; the upper head base is installed on the telescopic rod of the second cylinder, and the lower end of the guide rod is fixed to the upper head base; the upper cold sealing knife is connected to the upper head base by a fastening screw; a cold water pipe for circulating operation is installed in the upper cold sealing knife.

2. The hot and cold packaging machine for soft-pack lithium batteries using aluminum-plastic film according to claim 1, characterized in that: The lower heat sealing head assembly includes a lower head mounting seat, an upper heat insulation pad, an upper heating seat and an upper lower heat sealing knife stacked in sequence from bottom to top; the lower head mounting seat is mounted on the bottom plate of the mounting frame, and the upper lower heat sealing knife is connected to the upper heating seat by a fastening screw; a heating rod is installed in the upper heating seat; the upper heat sealing head assembly includes an upper head mounting seat, a lower heat insulation pad, a lower heating seat and a lower upper heat sealing knife stacked in sequence from top to bottom; the upper head mounting seat is mounted on the sliding mounting seat, and the lower upper heat sealing knife is connected to the lower heating seat by a fastening screw; a heating rod is installed in the lower heating seat.

3. The hot and cold packaging machine for soft-pack lithium batteries using aluminum-plastic film according to claim 2, characterized in that: The heating rod is a temperature-uniform heating rod.

4. The hot and cold packaging machine for soft-pack lithium batteries using aluminum-plastic film according to claim 2, characterized in that: The length of the heating rod in the upper heating seat is 22 cm longer than that of the upper heating seat, and the front and rear ends of the heating rod are respectively provided with 10 mm non-heating ends; the length of the heating rod in the lower heating seat is 22 cm longer than that of the upper heating seat, and the front and rear ends of the heating rod are respectively provided with 10 mm non-heating ends.

5. The aluminum-plastic film hot and cold packaging machine for soft-pack lithium batteries according to claim 1, characterized in that: The height of the lower hot sealing head assembly is higher than the height of the lower cold sealing head assembly.

6. The aluminum-plastic film hot and cold packaging machine for soft-pack lithium batteries according to claim 1, characterized in that: The soft-pack battery negative pressure placement table includes a negative pressure suction table, a lower suction table adapter plate, a slide rail mounting plate, a guide rod, a slide rail moving plate, a lower guide rail table, a linear motor, a suction table bottom plate, a guide rail and a third cylinder; the lower guide rail table is provided with two, respectively arranged on opposite sides of the suction table bottom plate; the upper part of the lower guide rail table is provided with a guide rail, the slide rail moving plate is installed on the guide rail and can slide along it; the two ends of the slide rail mounting plate are respectively connected to the slide rail moving plate by screws; the linear motor is installed on the suction table bottom plate, and the linear motor is connected to the slide rail mounting plate; the slide rail mounting plate is installed with a linear bearing, the lower end of the guide rod is installed on the suction table bottom plate, and the upper end of the guide rod passes through the linear bearing, the guide rod is provided with four, and the number of the linear bearings is the same as that of the guide rod. The number of the longitudinal rods is the same; the third cylinder is vertically mounted on the lower side of the slide rail mounting plate, and its telescopic rod passes through the slide rail mounting plate and is connected to the lower suction platform adapter plate through a floating joint; the negative pressure suction platform is mounted on the upper side of the lower suction platform adapter plate, and the negative pressure suction platform and the lower suction platform adapter plate form the extendable platform; a limit stop is also installed on the bottom plate of the suction platform, and the limit stop is located close to the side of the head mounting frame, and a limit bolt that can be rotatably adjusted in height is vertically installed on the top of the limit stop; the length of the negative pressure suction platform is longer than the length of the lower suction platform adapter plate, and the part of the negative pressure suction platform that exceeds the lower suction platform adapter plate is located close to the side of the head mounting frame, and the limit bolt of the limit stop forms the lower limit of the vertical movement of the negative pressure suction platform.

7. The aluminum-plastic film hot and cold packaging machine for soft-pack lithium batteries according to claim 6, characterized in that: The battery placement area of the negative pressure suction table is provided with nine holes, which are evenly distributed in three rows, with three holes in each row. The middle row of holes is the battery position adsorption holes, and the other two rows are air bag adsorption holes. The diameter of the air bag adsorption holes is 2mm; the negative pressure suction table is also provided with six criss-cross and connected long strip holes, with three long strip holes in each horizontal row and vertical row respectively. All nine holes are connected to the long strip holes, and the diameter of the long strip holes is 3mm; the long strip holes are connected to an external vacuum negative pressure device.

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