A battery cell vacuum packaging device

Abstract

This invention discloses a battery cell vacuum sealing device, comprising: a positioning component, a heat-sealing upper cavity component, a lifting component, and a middle cavity component; wherein, the heat-sealing upper cavity component includes an upper cavity body component, a sealing head opening and closing component, a sealing head pressurizing component, and a sealing head component; the sealing head component is provided with a temperature-controlled heating rod inside; the sealing head opening and closing component is used to control the opening and closing of the sealing head component; the sealing head pressurizing component is used to apply pressure to the sealing head component along the opening and closing direction of the sealing head component; the lifting component is used to drive the heat-sealing upper cavity component to rise or fall, away from or near the middle cavity component; the middle cavity component includes a middle cavity body component, an air support bag component, and a vacuuming component, the air support bag component being correspondingly arranged with the sealing head component; the heat-sealing upper cavity component is connected to the battery cell fixture through the middle cavity component to form a sealed heat-sealing chamber, and the battery cell to be sealed is housed in the chamber.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing, and in particular to a cell vacuum packaging device. Background Technology

[0002] In the electrolyte injection process of pouch batteries, electrolyte needs to be injected into the gas bag section of the battery, allowing it to enter the main body of the battery, i.e., the cell, before vacuum sealing. Existing cell vacuum sealing equipment often suffers from problems such as unstable vacuum environment, complex structure, difficulty in maintenance, or poor versatility, failing to adapt to different cell models. Therefore, there is an urgent need for a cell vacuum sealing device that can solve these problems. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is how to provide a cell vacuum packaging device that can provide a stable vacuum environment, has a simple structure, is easy to maintain and has strong versatility.

[0004] To address the aforementioned technical problems, this invention provides a battery cell vacuum packaging device, comprising: a positioning component, a heat-sealing upper cavity component, a lifting component, and a middle cavity component; wherein, the positioning component is used to fix and position the battery cell vacuum packaging device; the heat-sealing upper cavity component is lifted and positioned below the positioning component and above the middle cavity component, including an upper cavity assembly forming a receiving cavity, a sealing head opening and closing component partially housed in the receiving cavity, a sealing head pressurizing component, and a sealing head component fixed to the sealing head opening and closing component and below the receiving cavity; the sealing head component is provided with a temperature-controlled heating rod inside, used for heat-press sealing the outer packaging of the battery cell to be packaged on the fixture; the sealing head opening and closing component is fixed... Above the end cap assembly, a control assembly is used to open and close the end cap assembly; the end cap pressurizing assembly is used to apply pressure to the end cap assembly along the opening and closing direction of the end cap assembly; the lifting assembly is disposed between the positioning assembly and the heat-sealing upper cavity assembly, and is used to drive the heat-sealing upper cavity assembly to rise or fall, away from or near the middle cavity assembly; the middle cavity assembly is disposed below the heat-sealing upper cavity assembly, and includes a middle cavity body assembly forming a receiving space, an air support bag assembly disposed in the receiving space, and a vacuum assembly, the air support bag assembly being disposed correspondingly to the end cap assembly; the heat-sealing upper cavity assembly is connected to the cell fixture through the middle cavity assembly to form a sealed heat-sealing chamber, and the cell to be packaged is housed in the chamber.

[0005] In one feasible implementation, the head opening and closing assembly includes a head opening and closing cylinder and two V-shaped pull rods. The proximal ends of the two pull rods are connected to the telescopic end of the head opening and closing cylinder, and the distal ends are connected to the head assembly. The two pull rods drive the head assembly to open and close under the drive of the head opening and closing cylinder. The head pressurizing assembly includes a head pressurizing cylinder, a pressurizing assembly lifting cylinder, and two opposing pressurizing swing rods. The two pressurizing swing rods are arranged on both sides of the head opening and closing assembly along the opening and closing direction of the head assembly. The two pressurizing swing rods clamp or release the head assembly along the opening and closing direction of the head assembly under the drive of the pressurizing cylinder. The telescopic end of the pressurizing assembly lifting cylinder is connected to the two pressurizing swing rods to control the lifting and lowering of the two pressurizing swing rods. The head opening and closing cylinder, the head pressurizing cylinder, and the pressurizing assembly lifting cylinder are fixed above the outside of the receiving cavity.

[0006] In one feasible implementation, the end cap pressurizing assembly further includes: a first fixing member fixed to the second base plate of the upper cavity assembly, a second slide rail arranged vertically on the first fixing member, a second slider arranged on the second slide rail, and a second fixing member fixed to the second slider; two pressurizing swing rods are respectively connected to the second fixing member, the pressurizing assembly lifting cylinder is fixedly connected to the second fixing member, and the second fixing member is slidably connected to the second slide rail.

[0007] In one feasible implementation, the two pressure levers include a first pressure lever and a second pressure lever, the first pressure lever being connected to the movable end of the head pressure cylinder; the head pressure assembly also includes a guide block, which is slidably connected to the second pressure lever and is used to guide the movement direction of the second pressure lever.

[0008] In one feasible implementation, the head pressurization assembly further includes a first elastic element, one end of which is connected to the first pressurization lever and the other end of which is connected to the second pressurization lever.

[0009] In one feasible implementation, the lifting assembly includes a lifting cylinder, a lifting guide shaft assembly, and a first base plate. The fixed end of the lifting cylinder is fixed to the first base plate, and the movable end of the lifting cylinder is fixed to the upper cavity assembly. The lifting guide shaft assembly includes at least two guide shafts, which pass through the first base plate and are fixed to the second base plate of the upper cavity assembly, for guiding the lifting cylinder to drive the heat-sealed upper cavity assembly to lift.

[0010] In one feasible implementation, the positioning component includes a first fixing plate fixedly disposed thereon and upper side plates fixed on both sides of the first fixing plate. The cell vacuum sealing device further includes a flipping component, which includes a flipping cylinder and a flipping shaft. The fixed end of the flipping cylinder is fixed to the first fixing plate of the positioning component, the telescopic end of the flipping cylinder is fixed to the first substrate, and the flipping shaft is fixed on the first substrate. The flipping cylinder drives the heat-sealing upper cavity component to flip along the flipping shaft.

[0011] In one feasible implementation, the airbag assembly includes: a first traction assembly, a first clamping plate and a second clamping plate disposed opposite to each other along the opening and closing direction of the end cap assembly, a first connecting rod and a second connecting rod fixedly connected to the first clamping plate and the second clamping plate respectively, and a first guide rod, a second guide rod, a third guide rod and a fourth guide rod arranged alternately along the length direction of the end cap assembly; wherein, the two ends of the first connecting rod along the length direction are fixed to the first guide rod and the third guide rod respectively, and the two ends of the second connecting rod along the length direction are fixed to the second guide rod and the fourth guide rod respectively; the traction assembly is fixed to the first guide rod, the second guide rod, the third guide rod or the fourth guide rod respectively, and is used to drive the first guide rod, the second guide rod, the third guide rod or the fourth guide rod to move along the opening and closing direction of the end cap assembly.

[0012] In one feasible implementation, the traction assembly includes a first traction block and a second traction block in an inverted V shape. The distal ends of the first traction block and the second traction block are fixedly connected to the first guide rod and the second guide rod, respectively. The proximal ends of the first traction block and the second traction block are respectively provided with rollers. The cell vacuum sealing device further includes an air bag driving assembly, which includes an air bag driving cylinder and a V-shaped driving block. Under the drive of the air bag driving cylinder, the driving block approaches the proximal ends of the first traction block and the second traction block, separating the first traction block and the second traction block.

[0013] In one feasible implementation, the cell vacuum sealing device further includes at least one set of automatic locking jaws and locking limit blocks, which are respectively disposed at corresponding positions on the outside of the heat-sealed upper cavity assembly and the middle cavity assembly, for locking the heat-sealed upper cavity assembly and the middle cavity assembly in a locked state.

[0014] Implementing this invention has the following beneficial effects:

[0015] By connecting the upper cavity assembly and the middle cavity assembly to the fixture (lower cavity) carrying the battery cell, a heat-sealed chamber capable of withstanding large vacuum pressure is formed, providing a stable vacuum environment for battery cell packaging. At the same time, the structure is simple in design, easy to maintain and highly versatile.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the cell vacuum packaging device shown in some embodiments of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the heat-sealing upper cavity assembly of the battery cell vacuum packaging device according to the present invention.

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the end cap assembly of the cell vacuum packaging device shown in some embodiments of the present invention;

[0021] Figure 4 This is a partial three-dimensional structural diagram of the heat-sealed upper cavity assembly of the cell vacuum packaging device shown in some embodiments of the present invention;

[0022] Figure 5 This is a three-dimensional structural schematic diagram of the cap opening and closing assembly of the battery cell vacuum packaging device shown in some embodiments of the present invention;

[0023] Figure 6 This is a three-dimensional structural schematic diagram of the head pressurization assembly of the cell vacuum packaging device shown in some embodiments of the present invention;

[0024] Figure 7 This is a three-dimensional structural schematic diagram of the head pressurization assembly of the cell vacuum packaging device shown in some embodiments of the present invention from another angle;

[0025] Figure 8 This is a three-dimensional structural diagram of the head pressurization assembly of the cell vacuum packaging device shown in some embodiments of the present invention from another angle;

[0026] Figure 9 This is a three-dimensional structural schematic diagram of the lifting assembly of the cell vacuum packaging device shown in some embodiments of the present invention;

[0027] Figure 10 This is a three-dimensional structural schematic diagram of the cavity assembly of the cell vacuum packaging device shown in some embodiments of the present invention;

[0028] Figure 11 This is a three-dimensional structural schematic diagram of the air bag assembly of the battery cell vacuum sealing device shown in some embodiments of the present invention;

[0029] Figure 12 This is a three-dimensional structural schematic diagram of the air bag assembly of the cell vacuum sealing device shown in some embodiments of the present invention from another angle;

[0030] Figure 13 This is a three-dimensional structural schematic diagram of the air bag drive assembly of the cell vacuum sealing device shown in some embodiments of the present invention;

[0031] Figure 14 This is a three-dimensional structural diagram of the clamping claw assembly of the cell vacuum packaging device shown in some embodiments of the present invention;

[0032] Figure 15 This is a schematic diagram of the structure of the cell vacuum packaging device flipping assembly flipping cylinder lifting and flipping, as shown in some embodiments of the present invention.

[0033] The reference numeral in the figure: 100 - Cell vacuum packaging device;

[0034] 110 - Positioning component, 101 - First fixing plate, 102 - Second fixing plate, 103 - Upper side plate, 104 - First base plate;

[0035] 200-Heat-sealed upper cavity assembly; 201-Cover plate, 202-Upper cavity side plate, 203-Second substrate; 210-End assembly, 211-Temperature control heating rod, 212-First sealing block, 213-Second sealing block, 214-Protective component, 215-Heat insulation component, 216-First slide rail, 217-First slider; 220-End opening and closing assembly, 221-End opening and closing cylinder, 222-End opening and closing connecting rod, 223-Pull rod, 224-End opening and closing fixing component; 230- Head pressurization assembly, 2301-Head pressurization cylinder, 2302-Pressure assembly lifting cylinder, 2303-First pressurization swing arm, 2304-Second pressurization swing arm, 2305-First fixing component, 2306-Second fixing block, 2307-Third fixing block, 2308-Guide block, 2309-Second slide rail, 2310-Second slider, 2311-Third through hole, Rotating shaft assembly, 2312-First elastic element, 2313-Guide roller, 2314-Reinforcing component;

[0036] 300 - Lifting assembly; 310 - Lifting cylinder; 320 - Lifting guide shaft assembly; 321 - Lifting guide shaft; 322 - Connecting shaft.

[0037] 400-Cavity assembly; 401-Cavity side plate; 404-Observation window; 405-Cavity bottom plate; 410-Airbag assembly; 411-First guide rod; 412-Second guide rod; 413-Third guide rod; 414-Fourth guide rod; 415-First clamping plate; 416-Second clamping plate; 417-First connecting rod; 418-Second connecting rod; 419-Traction assembly; 4191-First traction block; 4192-Second traction block; 421-Third slide rail; 422-Third positive slider; 423-Third negative slider; 424-Fourth slide rail; 425-Fourth positive slider; 426-Fourth negative slider; 427-Second traction assembly; 428-Second elastic element; 420-Vacuum assembly; 421-Vacuum interface; 422-Vacuum pipeline.

[0038] 500 - Tilting assembly; 510 - Tilting cylinder; 520 - Tilting shaft; 530 - Tilting guide shaft; 540 - Tilting guide groove;

[0039] 600-Airbag drive assembly; 610 First airbag drive assembly; 620 Second airbag drive assembly; 611-Airbag drive cylinder; 612-Drive block; 613-Fifth slide rail; 614-Fifth slider; 615-Outer shell assembly.

[0040] 700-Clamping gripper assembly; 710-Clamping gripper cylinder; 720-Clamping gripper; 701-Clamping limit block;

[0041] 800-Scapegoat Structure; Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] It should be noted that when an element is said to be "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] refer to Figures 1-15 This application provides a cell vacuum packaging device 100, which includes: a positioning component 110, a heat-sealing upper cavity component 200, a lifting component 300, and a middle cavity component 400. The positioning component 110 is used to fix the cell vacuum packaging device 100 in a fixed position. For example, the positioning component 110 can fix the cell vacuum packaging device 100 to a base frame, which is fixed to the ground. Alternatively, the positioning component 110 can fix the cell vacuum packaging device 100 to other fixed equipment, such as a battery manufacturing production line or equipment. The positioning component 110 fixes the cell vacuum packaging device 100 at a position corresponding to the cell fixture production line, thus facilitating the docking of the fixture carrying the cell with the cell vacuum packaging device. In this embodiment, the positioning component 110 includes a first fixing plate 101, a second fixing plate 102, and an upper side plate 103. The first fixing plate 101 is used to fix the fixing end of the flipping cylinder 510 of the flipping component 510. The second fixing plate 102 is fixedly connected to the first fixing plate 101 to fix the cell vacuum sealing device 100 to other equipment or devices.

[0046] The heat-sealing upper cavity assembly 200 is vertically positioned below the positioning assembly 110 and above the middle cavity assembly 400. The heat-sealing upper cavity assembly 200 includes an upper cavity body assembly, a head opening and closing assembly 220, a head pressurizing assembly 230, and a head assembly 210. The head assembly 210 is used to heat-pressurize the outer packaging of the battery cell to be packaged on the fixture. The upper cavity body assembly includes a cover plate 201, four upper cavity side plates 202, and a second substrate 203. The cover plate 201, the four upper cavity side plates 202, and the second substrate 203 form a receiving cavity. In this embodiment, the heat-sealing upper cavity assembly 200 includes five head assemblies 210, five head opening and closing assemblies 220, and ten head pressurizing assemblies 230. The battery cell vacuum packaging device 100 can package five soft-pack battery cells at a time. Each head assembly 210 includes two paired first sealing blocks 212. A first through hole for accommodating a temperature-controlled heating rod 211 is formed inside the first sealing block 212. Each battery has an independently operating end cap assembly 210, end cap opening and closing assembly 220, and end cap pressurizing assembly 230. Each end cap assembly 210 contains a temperature-controlled heating rod 211. The temperature-controlled heating rod 211 can be a heating rod with dual temperature control and foolproof performance, and also has a real-time monitoring and alarm function. The temperature alarm function is automatically activated when the cell vacuum sealing device 100 is running, which can prevent false sealing caused by excessive end cap temperature. For the temperature-controlled heating rod 211 element, the heating rod can be selected according to the condition of ensuring flatness to ensure uniform heating. The first sealing block 212 can be made of a metal material with good electrical conductivity, such as copper. In this embodiment, the end cap assembly 210 also includes two paired second sealing blocks 213. The two second sealing blocks 213 are respectively fixed to the two first sealing blocks 212. The second sealing blocks 213 are also made of a metal material with good electrical conductivity. During the heat-sealing of the pouch battery, the second sealing block 213 directly contacts the pouch battery packaging. Heated by the temperature-controlled heating rod 211, and with the thermal conductivity of the first sealing block 212, heat is transferred to the pouch battery packaging. Simultaneously, under the pressure of the sealing head pressurizing assembly 230, the pouch battery packaging is heat-sealed. Since the second sealing block 213 is in direct contact with the pouch battery packaging, it can be made of a metal with superior thermal conductivity, such as a platinum-copper alloy. The volume of the second sealing block 213 is significantly smaller than that of the first sealing block 212, thus saving costs. Furthermore, the second sealing block 213 can be replaced according to different battery specifications or different packaging specifications, increasing the versatility of the cell vacuum sealing device 100.

[0047] The end cap assembly 210 also includes a protective element 214, a heat insulation element 215, a first slide rail 216, and a first slider 217. The protective element 214 is fixed to both sides of the first sealing block 212 along the opening and closing direction of the end cap, and is typically made of a wear-resistant material. This reduces wear on the end cap pressurizing assembly 230 during pressurization, extending the service life of the end cap assembly 210. The first slide rail 216 is arranged along the opening and closing direction of the end cap assembly 210. The heat insulation element 215 is fixed above the first sealing block 212 and fixedly connected to the first slider 217. Thus, the first slide rail 216 guides the opening and closing of the end cap assembly 210.

[0048] The end cap opening and closing assembly 220 is disposed above the end cap assembly 210 and fixedly connected to the end cap assembly 210. In this embodiment, the end cap opening and closing assembly 220 includes an end cap opening and closing cylinder 221 and two pull rods 223 arranged in a V-shape. The two pull rods 223 drive the end cap assembly 210 to open and close under the control of the end cap opening and closing cylinder 221. The distal ends of the two pull rods 223 are respectively fixed on both sides of the width direction of the first sealing block 212. The end cap opening and closing assembly 220 also includes an end cap opening and closing connecting shaft 222, one end of which is fixed to the telescopic end of the end cap opening and closing cylinder 221, and the other end is fixed to the proximal ends of the two pull rods 223.

[0049] The head pressurizing assembly 230 is used to apply pressure to the head assembly 210 along the opening and closing direction of the head assembly 210. In this embodiment, ten head pressurizing assemblies 230 are arranged in pairs. The two head pressurizing assemblies 230 are connected by a first fixing member 2305. The first fixing member 2305 is also provided with a second through hole, through which the head opening and closing connecting shaft 222 passes, and the head opening and closing assembly 220 is fixed between the two paired head pressurizing assemblies 230. In this embodiment, the head pressurizing assembly 230 includes a head pressurizing cylinder 2301, a pressurizing assembly lifting cylinder 2302, and two pressurizing rocker arms arranged opposite each other. The two pressurizing rocker arms are arranged on both sides of the head opening and closing assembly 220 along the opening and closing direction of the head assembly 210. Under the drive of the pressurizing cylinder, the two pressurizing rocker arms clamp or release the head assembly 210 along the opening and closing direction of the head assembly 210. The pressurizing component lifting cylinder 2302 is used to control the lifting and lowering of the two pressurizing rocker arms. In this embodiment, the end cap pressurizing component 230 further includes: a first fixing member 2305 fixed to the second base plate 203 of the upper cavity component, a second slide rail 2309 vertically disposed on the first fixing member 2305, a second slider 2310 disposed on the second slide rail 2309, and a second fixing member fixed to the second slider 2310. In this embodiment, the second fixing member includes a second fixing block 2306 and a third fixing block 2307 fixed to each other. The two pressurizing rocker arms are respectively connected to the second fixing block 2306. The pressurizing component lifting cylinder 2302 is fixedly connected to the third fixing block 2307. The second fixing block 2306 is slidably connected to the second slide rail 2309. In this embodiment, the two pressurizing rocker arms include a first pressurizing rocker arm 2303 and a second pressurizing rocker arm 2304, and the first pressurizing rocker arm 2303 is connected to the movable end of the end cap pressurizing cylinder 2301. In this embodiment, a third through hole is provided at the position where the second fixing block 2306 connects with the first pressure swing rod 2303 and the second pressure swing rod 2304. A rotating shaft assembly is provided in the third through hole. The two pressure swing rod assemblies are rotatably connected to the second connecting member through the rotating shaft assembly. The end cap pressure assembly 230 also includes a guide block 2308. The guide block 2308 is slidably connected to the second pressure swing rod 2304. A guide roller 2313 is provided at the contact point between the second pressure swing rod 2304 and the guide block 2308. The contact surface between the guide block 2308 and the second pressure swing rod 2304 is wedge-shaped, and the guide block 2308 can guide the movement direction of the second pressure swing rod 2304. In this embodiment, the end cap pressure assembly 230 also includes a first elastic element 2312. One end of the first elastic element 2312 is connected to the first pressure swing rod 2303, and the other end is connected to the second pressure swing rod 2304. The first elastic element 2312 can be a spring. The first elastic element 2312 can further ensure the clamping force between the two pressure swing rods on the end cap assembly 210.Furthermore, the end cap pressurizing assembly 230 also includes a reinforcing member 2314, which is fixed to the first fixing member 2305 and the second substrate 203 respectively, to increase the stability of the fixing of the first fixing member 2305 and the second substrate 203.

[0050] The head opening and closing cylinder 221, the head pressurizing cylinder 2301, and the pressurizing component lifting cylinder 2302 are fixed above the outside of the receiving cavity. The remaining parts of the head opening and closing component 220 and the head pressurizing component 230 are housed within this receiving cavity. This ensures that the heat sealing chamber can withstand a large vacuum pressure. Actual process operation tests show that the pressure drop in the heat sealing chamber does not exceed 5 kPa within one minute.

[0051] The lifting assembly 300 is positioned above the heat-sealing upper cavity assembly 200. The lifting assembly 300 is used to drive the heat-sealing upper cavity assembly 200 upwards away from the middle cavity assembly 400, or to drive the heat-sealing upper cavity assembly 200 downwards towards the middle cavity assembly 400. The middle cavity assembly 400 is positioned below the heat-sealing upper cavity assembly 200.

[0052] In this embodiment, the lifting assembly 300 includes a lifting cylinder 310, a lifting guide shaft 321 assembly 320, and a first base plate 104.

[0053] The fixed end of the lifting cylinder 310 is fixed to the first base plate 104. The movable end of the lifting cylinder 310 is fixed to the upper cavity assembly. The lifting guide shaft 321 assembly 320 includes at least two guide shafts. In this embodiment, the lifting guide shaft 321 assembly 320 includes four guide shafts, which are arranged in pairs and connected and fixed by a connecting shaft 322. The four guide shafts pass through the first base plate 104 and are fixed to the second base plate 203 of the upper cavity assembly, guiding the lifting cylinder 310 to drive the heat-sealed upper cavity assembly 200 to rise and fall.

[0054] In this embodiment, the cell vacuum sealing device 100 further includes a flipping assembly 510. The positioning assembly 110 includes a first fixing plate 101 fixedly disposed thereon and upper side plates 103 fixed to both sides of the first fixing plate 101. The flipping assembly 510 includes a flipping cylinder 510 and a flipping shaft 520. The fixed end of the flipping cylinder 510 is fixed to the first fixing plate 101 of the positioning assembly 110. The telescopic end of the flipping cylinder 510 is fixed to the first substrate 104. The flipping shaft 520 is fixed to the first substrate 104. The flipping cylinder 510 drives the heat-sealing upper cavity assembly 200 to flip along the flipping shaft 520. The flipping assembly 510 also includes a flipping guide shaft 530. The upper side plate 103 has a flipping guide groove 540, and the flipping guide shaft 530 is fixed to the first substrate 104 and passes through the flipping guide groove 540. When the tilting cylinder 510 drives the heat-sealing upper cavity assembly 200 to tilt along the tilting shaft 520, the tilting guide shaft 530 can guide the tilting of the heat-sealing upper cavity assembly 200, increasing the stability of the tilting during equipment maintenance. By setting the tilting structure, it is convenient to replace the end cap assembly 210, or perform maintenance on multiple end cap assemblies 210, etc.

[0055] The cavity assembly 400 includes a cavity body assembly forming a receiving space, an air bag assembly 410 disposed in the receiving space, and a vacuum assembly 430. The cavity body assembly includes a cavity side plate 401 interconnected with each other and a cavity bottom plate 405 disposed at the bottom of the cavity side plate. The cavity bottom plate 405 has a central cutout for the battery cell to be packaged to pass through. The air bag assembly 410 is correspondingly disposed with the end cap assembly 210. The heat-sealing upper cavity assembly 200 connects with the battery cell fixture through the cavity assembly 400 to form a sealed chamber, in which the battery cell is housed during battery cell packaging. The air bag assembly 410 is used to support the air bag outside the battery cell during vacuum packaging, keeping the packaging air bag in an upright position, thereby achieving air bag shaping. The vacuum assembly 430 includes a vacuum interface 431 and a vacuum pipeline 432. The vacuum line 432 is fixed to the side plate of the central cavity assembly 400 and connected to the vacuum port 431. A vacuum chamber heat spreader is provided inside the vacuum line 432. In this embodiment, a vacuum diffuser mechanism and an air bag shaping mechanism are provided to avoid heat radiation and seal wrinkling.

[0056] In this embodiment, the airbag assembly 410 includes: a first traction assembly 419; a first clamping plate 415 and a second clamping plate 416 arranged opposite to each other along the opening and closing direction of the end cap assembly 210; a first connecting rod 417 and a second connecting rod 418 fixedly connected to the first clamping plate 415 and the second clamping plate 416 respectively; and a first guide rod 411, a second guide rod 412, a third guide rod 413, and a fourth guide rod 414 arranged alternately along the length direction of the end cap assembly 210. The first connecting rod 417 is fixed at both ends along its length to the first guide rod 411 and the third guide rod 413 respectively. The second connecting rod 418 is fixed at both ends along its length to the second guide rod 412 and the fourth guide rod 414 respectively. The traction assembly 419 is fixed to the first guide rod 411, the second guide rod 412, the third guide rod 413, or the fourth guide rod 414 respectively. The traction assembly 419 is used to drive the first guide rod 411, the second guide rod 412, the third guide rod 413 or the fourth guide rod 414 to move along the opening and closing direction of the end cap assembly 210.

[0057] In this embodiment, the traction assembly 419 includes a first traction block 4191 and a second traction block 4192 in an inverted V shape. The distal ends of the first traction block 4191 and the second traction block 4192 are fixedly connected to the first guide rod 411 and the second guide rod 412, respectively. The proximal ends of the first traction block 4191 and the second traction block 4192 are respectively provided with rollers. In this embodiment, the airbag assembly 410 also includes a third slide rail 421, a third positive slider 422, a third negative slider 423, a fourth slide rail 424, a fourth positive slider 425, a fourth negative slider 426, and a second traction assembly 427. Among them, the third slide rail 421 and the fourth slide rail 424 are both fixed on the bottom plate 405 of the central cavity along the opening and closing direction of the clamping plate, that is, the opening and closing direction of the end cap assembly 210. The third positive slider 422 and the third negative slider 423 are slidably connected in pairs on the third slide rail 421. The third positive slider 422 and the third negative slider 423 are fixedly connected to the second guide rod 412 and the first guide rod 411, respectively. Under the traction of the traction assembly 419, the third positive slider 422 and the third negative slider 423 slide in opposite directions on the third slide rail 421, thereby realizing the opening and closing of the first clamping plate 415 and the second clamping plate 416.

[0058] Correspondingly, the structure of the second traction component 427 corresponds to that of the first traction structure 419. A fourth positive slider 425 and a fourth negative slider 426 are slidably connected in pairs on the fourth slide rail 424. The fourth positive slider 425 and the third negative slider 426 are fixedly connected to the fourth guide rod 414 and the third guide rod 413, respectively. Under the traction of the second traction component 427, the fourth positive slider 425 and the third negative slider 426 slide in opposite directions on the fourth slide rail 424, thereby opening and closing from the other end of the first clamping plate 415 and the second clamping plate 416. The two ends cooperate with each other to ensure the stability of the opening and closing of the first clamping plate 415 and the second clamping plate 416, as well as the uniformity of the force when supporting the battery cell air bag, ensuring the flatness of the battery cell air bag and optimizing the shaping effect of the air bag.

[0059] The core vacuum sealing device 100 also includes an airbag driving assembly 600. In this embodiment, the core vacuum sealing device 100 includes two airbag driving assemblies: a first airbag driving assembly 610 and a second airbag driving assembly (not shown). The first airbag driving assembly 610 and the second airbag driving assembly are respectively fixed on the second base plate 203 at positions corresponding to the traction assembly 4129 and the second traction assembly 427. The airbag driving assembly 600 includes: an airbag driving cylinder 611, a driving block 612, a fifth slide rail 613, a fifth slider 614, and a housing assembly 615. The fifth slide rail 613 is fixed vertically on the housing assembly 615. The driving block 612 is fixed to the movable end of the airbag driving cylinder 611 and fixed to the fifth slider 614. The driving block 612 is slidably connected to the fifth slide rail 613 in the vertical direction through the fifth slider 614. The part of the driving block 612 that contacts the traction assembly 419 or the second traction assembly 427 has a V-shaped structure. Driven by the airbag drive cylinder 611, the drive block 612 approaches the proximal ends of the first traction block 4191 and the second traction block 4192, separating the first traction block 4191 from the second traction block 4192.

[0060] In this embodiment, the traction assembly 419 further includes a second elastic element 428. The second elastic element 428 is a spring, with its two ends connected to the distal ends of the first traction block 4191 and the second traction block 4192, respectively. Thus, the spring force further maintains the first traction block 4191 and the second traction block 4192 in a close-to-each-other state, i.e., supporting the battery cell air bag. Simultaneously, the second elastic element 428 can adjust its elastic force or spring size according to different battery cell specifications, thereby increasing the versatility of the air bag assembly 410 and meeting the needs of battery cell packaging of different specifications.

[0061] The cell vacuum sealing device 100 may further include at least one set of automatic locking gripper assemblies 700 and locking limit blocks 701. These are used to lock the heat-sealed upper cavity assembly 200 and the middle cavity assembly 400 in a locked state. In this embodiment, the cell vacuum sealing device 100 further includes two sets of automatic locking gripper assemblies 700 and locking limit blocks 701. The automatic locking gripper assemblies 700 and locking limit blocks 701 are respectively disposed at corresponding positions on the outer sides of the heat-sealed upper cavity assembly 200 and the middle cavity assembly 400, and are used to lock the heat-sealed upper cavity assembly 200 and the middle cavity assembly 400 in a locked state. The automatic locking gripper assembly 700 includes a locking gripper cylinder 710 and a locking gripper 720. The clamping jaws 720 are fixed in pairs to the telescopic end of the clamping jaw cylinder 710. Driven by the clamping jaw cylinder 710, the clamping jaws 720 move closer to or further away, thereby being locked or unlocked by the clamping limit block 701. In one feasible embodiment, the cell vacuum sealing device 100 may also include only one set of automatic clamping jaw assembly 700 and clamping limit block 701, or, depending on actual process requirements, include two or more sets of movable clamping jaw assembly 700 and clamping limit block 701.

[0062] In this embodiment, the cell vacuum sealing device 100 is further provided with an observation window 404, which is disposed on the cavity side plate 401 of the cavity, and the observation window 404 is oriented along the length of the end cap. This structural arrangement facilitates the observation of the cell inside the cavity by the operator.

[0063] In this embodiment, the cell vacuum sealing device 100 also includes a scapegoat structure 800. The scapegoat structure 800 includes a scapegoat block, a scapegoat baffle, and a scapegoat handle. The scapegoat block is disposed on the first substrate 104 and the cover plate 201, and the scapegoat baffle has multiple fourth through holes for engaging the scapegoat block. The distances between the multiple fourth through holes are sequentially arranged, which can be used for maintenance and other operations when the lifting cylinder 310 raises and lowers the heat-sealing upper cavity assembly 200 to different heights. The scapegoat structure 800 can be connected to an external central control system. By setting the scapegoat structure between the first substrate 104 and the cover plate 201, when the cell vacuum sealing device 100 activates the scapegoat structure 800, all cylinders and motors stop working, thus avoiding personnel injury caused by misoperation during maintenance and repair.

[0064] The working process of the cell vacuum packaging device 100 in this embodiment is as follows:

[0065] The lifting cylinder 310 of the lifting assembly 300 drives the heat-sealed upper cavity assembly 200 to descend and dock with the middle cavity assembly 400;

[0066] The fixture streamline transports the fixture carrying the battery cell to the corresponding middle cavity position. The fixture (lower cavity) closes with the heat-sealing upper cavity assembly 200 and the middle cavity, and the automatic locking gripper assembly 700 locks it in place.

[0067] The vacuum assembly 430 is connected to an external vacuum device to evacuate the heat-sealed chamber.

[0068] The air bag assembly 410 clamps and straightens the battery cell air bag;

[0069] Adjust the temperature of the heating rod 211 of the end cap assembly 210, and the end cap opening and closing assembly 220 closes the end cap assembly 210;

[0070] The head pressurization assembly 230 descends and applies pressure;

[0071] Heat sealing complete;

[0072] The end cap assembly 210 is opened, the air bag assembly 410 is opened, and the heat-sealed upper cavity assembly 200 and the middle cavity assembly 400 are separated from the fixture.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A cell vacuum sealing device, characterized in that, The cell vacuum sealing device includes: a positioning component, a heat-sealing upper cavity component, a lifting component, and a middle cavity component; in, The positioning component is used to fix and position the cell vacuum packaging device. The heat-sealing upper cavity assembly is vertically positioned below the positioning assembly and above the middle cavity assembly. It includes an upper cavity body assembly forming a receiving cavity, a head opening and closing assembly partially housed in the receiving cavity, a head pressurizing assembly, and a head assembly fixed to the head opening and closing assembly and below the receiving cavity. The end cap assembly is equipped with a temperature-controlled heating rod for heat-pressing the outer packaging of the battery cell to be packaged on the fixture; the end cap opening and closing assembly is fixed above the end cap assembly for controlling the opening and closing of the end cap assembly; the end cap pressurizing assembly is used to apply pressure to the end cap assembly along the opening and closing direction of the end cap assembly. The lifting component is disposed between the positioning component and the heat-sealing upper cavity component, and is used to drive the heat-sealing upper cavity component to rise or fall, away from or near the middle cavity component; The middle cavity assembly is disposed below the heat-sealing upper cavity assembly and includes a middle cavity body assembly forming a receiving space, an air support bag assembly disposed in the receiving space, and a vacuum assembly. The air support bag assembly is disposed corresponding to the sealing head assembly. The heat-sealing upper cavity assembly connects to the cell fixture via the middle cavity assembly to form a sealed heat-sealing chamber, in which the cell to be packaged is placed.

2. The cell vacuum packaging device according to claim 1, characterized in that, The head opening and closing assembly includes a head opening and closing cylinder and two pull rods arranged in a V-shape. The proximal ends of the two pull rods are connected to the telescopic end of the head opening and closing cylinder, and the distal ends are connected to the head assembly. The two pull rods drive the head assembly to open and close under the drive of the head opening and closing cylinder. The head pressurization assembly includes a head pressurization cylinder, a pressurization assembly lifting cylinder, and two opposing pressurization rocker arms. The two pressurization rocker arms are arranged on both sides of the head opening and closing assembly along the opening and closing direction of the head assembly. Driven by the pressurization cylinder, the two pressurization rocker arms clamp or release the head assembly along the opening and closing direction of the head assembly. The telescopic end of the pressurization assembly lifting cylinder is connected to the two pressurization rocker arms and is used to control the lifting and lowering of the two pressurization rocker arms. The head opening and closing cylinder, the head pressurizing cylinder, and the pressurizing component lifting cylinder are fixed above the outside of the receiving cavity.

3. The cell vacuum packaging device according to claim 2, characterized in that, The head pressurization assembly further includes: a first fixing member fixed to the second base plate of the upper cavity assembly, a second slide rail arranged vertically on the first fixing member, a second slider arranged on the second slide rail, and a second fixing member fixed to the second slider; Two pressure swing arms are respectively connected to the second fixing member, the lifting cylinder of the pressure assembly is fixedly connected to the second fixing member, and the second fixing member is slidably connected to the second slide rail.

4. The cell vacuum packaging device according to claim 3, characterized in that, The two pressure levers include a first pressure lever and a second pressure lever, wherein the first pressure lever is connected to the movable end of the end cap pressure cylinder; The head pressurization assembly also includes a guide block, which is slidably connected to the second pressurization rocker arm and is used to guide the movement direction of the second pressurization rocker arm.

5. The cell vacuum packaging device according to claim 4, characterized in that, The head pressurization assembly further includes a first elastic element, one end of which is connected to the first pressurization swing rod, and the other end of which is connected to the second pressurization swing rod.

6. The cell vacuum packaging device according to claim 1, characterized in that, The lifting assembly includes a lifting cylinder, a lifting guide shaft assembly, and a first base plate. The fixed end of the lifting cylinder is fixed to the first base plate, and the movable end of the lifting cylinder is fixed to the upper cavity assembly. The lifting guide shaft assembly includes at least two guide shafts, which pass through the first substrate and are fixed to the second substrate of the upper cavity assembly, and are used to guide the lifting cylinder to drive the heat-sealed upper cavity assembly to lift.

7. The cell vacuum packaging device according to claim 6, characterized in that, The positioning component includes a first fixing plate fixedly disposed thereon and an upper side plate fixed on both sides of the first fixing plate. The cell vacuum sealing device further includes a flipping component, which includes a flipping cylinder and a flipping shaft. The fixed end of the flipping cylinder is fixed to the first fixing plate of the positioning component, the telescopic end of the flipping cylinder is fixed to the first base plate, and the flipping shaft is fixed on the first base plate. The flipping cylinder drives the heat-sealing upper cavity component to flip along the flipping shaft.

8. The cell vacuum packaging device according to claim 1, characterized in that, The air-supporting bag assembly includes: a first traction assembly; a first clamping plate and a second clamping plate arranged opposite each other along the opening and closing direction of the end cap assembly; a first connecting rod and a second connecting rod fixedly connected to the first clamping plate and the second clamping plate respectively; and a first guide rod, a second guide rod, a third guide rod, and a fourth guide rod arranged alternately along the length direction of the end cap assembly. The first connecting rod has its two ends fixed to the first guide rod and the third guide rod along its length, and the second connecting rod has its two ends fixed to the second guide rod and the fourth guide rod along its length. The traction assembly is fixed to the first guide rod, the second guide rod, the third guide rod, or the fourth guide rod respectively, and is used to drive the first guide rod, the second guide rod, the third guide rod, or the fourth guide rod to move along the opening and closing direction of the end cap assembly.

9. The cell vacuum packaging device according to claim 8, characterized in that, The traction assembly includes a first traction block and a second traction block in an inverted V shape. The distal ends of the first traction block and the second traction block are fixedly connected to the first guide rod and the second guide rod, respectively. The proximal ends of the first traction block and the second traction block are respectively provided with rollers. The cell vacuum sealing device further includes an air bag driving assembly, which includes an air bag driving cylinder and a V-shaped driving block. The driving block moves closer to the proximal ends of the first traction block and the second traction block under the drive of the air bag driving cylinder, thereby separating the first traction block from the second traction block.

10. The cell vacuum sealing device according to claim 1, characterized in that, The cell vacuum sealing device further includes at least one set of automatic locking jaws and locking limit blocks. The automatic locking jaws and locking limit blocks are respectively disposed at corresponding positions on the outside of the heat-sealed upper cavity assembly and the middle cavity assembly, and are used to lock the heat-sealed upper cavity assembly and the middle cavity assembly in a locked state.

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