A high-temperature resistant aluminum foil composite packaging bag for lithium battery negative electrode materials

Abstract

The present invention relates to the technical field of battery material packaging bags, and in particular to a high-temperature resistant aluminum foil composite packaging bag for lithium battery negative electrode materials, comprising: an outer bag, a closing component for closing the outer bag is arranged above the outer bag; a protective component one, the protective component one is connected to the inner side wall of the outer bag; a support frame, the support frame includes a top plate and a support tube; a protective component two, the protective component two includes a fusing mechanism and a protective mechanism; an inner bag, the inner bag is used for sealing and storing lithium battery negative electrode materials; the present invention can further extract the air between the outer bag and the inner bag when the crane lifts the outer bag through the design of the exhaust mechanism, thereby ensuring the vacuum degree between the outer bag and the inner bag during transportation; when a fire ignites the insulating protective layer one of the outer bag, the high-temperature heating fusing mechanism melts it, thereby triggering the protective mechanism to seal the outer bag on all sides, which can effectively reduce the impact of the fire on the lithium battery negative electrode materials in the inner bag, and is worthy of promotion.

Description

Technical Field

[0001] The present invention relates to the technical field of battery material packaging bags, in particular to an aluminum foil composite packaging bag for high-temperature resistant lithium battery negative electrode materials. Background Art

[0002] A ton bag is a type of transport packaging container. It is moisture-proof, dust-proof, radiation-resistant, strong and safe, and has sufficient structural strength. Since container bags are easy to load, unload and transport, the loading and unloading efficiency has been significantly improved, and they have developed rapidly in recent years. In recent years, with the development of the electronics industry, the demand for lithium batteries in industrial production has also been increasing. The lithium battery raw materials purchased by various manufacturers are usually packaged and transported in ton bags as powdered lithium battery positive or negative electrode materials. Due to the special nature of lithium battery production materials, in addition to conventional dust and moisture-proof measures, the lithium battery materials need to be vacuum-packed and fire-proofed during transportation. Therefore, we have proposed a high-temperature resistant lithium battery negative electrode material aluminum foil composite packaging bag for reasonable protection of lithium battery negative electrode materials during transportation. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-temperature resistant aluminum foil composite packaging bag for lithium battery negative electrode materials to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A high-temperature resistant lithium battery negative electrode material aluminum foil composite packaging bag, comprising:

[0006] An outer bag, wherein a closing assembly for closing the outer bag is provided above the outer bag;

[0007] A protective component 1 connected to the inner wall of the outer bag, the protective component 1 having a five-layer structure, comprising, from the outside to the inside, an insulating protective layer 1 for insulating the negative electrode material, an aluminum foil for moisture-proof and heat-insulating, an insulating protective layer 2 for secondary insulation protection of the negative electrode material, and adhesive layers disposed on both sides of the aluminum foil for adhering the insulating protective layer 1 and the insulating protective layer 2;

[0008] A support frame, comprising a top plate and a support tube, wherein the support tube is connected to the top plate and is used to support the outer bag;

[0009] A lifting assembly, comprising a handle and an exhaust mechanism, wherein the handle is connected to the support tube and is used to lift the outer bag. By pulling the handle, the exhaust mechanism is driven to extract the air from the outer bag;

[0010] A second protection component connected to the support frame includes a fuse mechanism and a protection mechanism. When the ambient temperature around the outer bag melts the fuse mechanism, the protection mechanism isolates the outer bag and provides temperature protection; and

[0011] The inner bag is arranged inside the outer bag and is used for sealing and storing the negative electrode material of the lithium battery.

[0012] Preferably, the outer bag is provided with a material port, and the closing assembly includes a snap ring, a cover plate and an air pump. The snap ring is provided at the material port, and the cover plate and the snap ring are provided corresponding to each other. The cover plate can be fixedly connected to the snap ring by rotation. The air pump is provided on the cover plate, and the air pump is used to extract air between the outer bag and the inner bag to the outside.

[0013] Preferably, the insulating protective layer 1 is made of nylon material.

[0014] Preferably, the second insulating protective layer is a polypropylene film.

[0015] Preferably, an air pumping cavity is provided inside the support tube, the handle is made of nylon rope, the air pumping mechanism includes a sealing block, a one-way air valve 1, a one-way air valve 2 and a reset spring, one end of the handle is connected to the sealing block, the sealing block is slidably connected to the air pumping cavity, the one-way air valve 1 and the one-way air valve 2 are both connected to the support tube, the one-way air valve 1 is used to transport the air in the outer bag to the air pumping cavity, the one-way air valve 2 is also connected to the side wall of the outer bag, the one-way air valve 2 is used to transport the air in the air pumping cavity to the outside of the outer bag, and the two ends of the reset spring are respectively connected to the air pumping cavity and the sealing block.

[0016] Preferably, a movable slide groove is provided on the side wall of the support tube, and the protective mechanism includes an isolation outer plate, an isolation inner plate, a driving spring and a flame retardant. The isolation outer plate is symmetrically arranged on both sides of the movable slide groove and is fixedly connected to the side wall of the movable slide groove. The isolation inner plate is movably inserted into the isolation outer plate, and the isolation inner plate is slidingly connected to the movable slide groove. A groove is provided inside the isolation inner plate, and the flame retardant is provided in the groove. Both ends of the driving spring are respectively connected to the isolation inner plate and the isolation outer plate. The driving spring is used to drive the isolation inner plate to move along the movable slide groove, and the fuse mechanism is used to fix the driving spring at normal temperature.

[0017] Preferably, the handle is connected to the isolation inner plate at one end away from the sealing block, and when the isolation inner plate moves to the bottom of the movable chute, it drives the portion of the handle extending outside the support tube into the support tube.

[0018] Preferably, the fuse mechanism is a polyurethane block, a part of the drive spring is arranged inside the polyurethane block, and the drive spring is fixedly connected to the polyurethane block at normal temperature. The polyurethane block is used to fix the drive spring at normal temperature to ensure that the isolation inner plate is inside the isolation outer plate at normal temperature.

[0019] Preferably, the flame retardant is polyurethane particles.

[0020] Preferably, the inner bag is made of aluminum foil.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention reinforces the outer bag through the five-layer structure in the protective component 1, so that the outer bag has certain fireproof, anti-static and moisture-proof properties, and the outer bag and the inner bag (aluminum foil) cooperate with each other to achieve the purpose of multiple moisture-proof and anti-static; through the design of the exhaust mechanism, the air between the outer bag and the inner bag can be further extracted when the crane lifts the outer bag, thereby ensuring the vacuum degree between the outer bag and the inner bag during the transportation process, thereby further protecting the battery negative electrode material vacuum-packed in the inner bag from water and moisture, and because the exhaust mechanism is set, the air between the outer bag and the inner bag is continuously extracted during the transportation process of the crane, which can effectively increase the fit between the inner bag and the outer bag and thus reduce the contact area between the outer bag and the fire when a fire occurs; when the fire ignites the outermost insulating protective layer 1 (nylon) of the outer bag, the high-temperature heating fuse mechanism (polyurethane block) melts it, thereby triggering the protective mechanism to seal the outer bag on all sides, which can effectively reduce the impact of the fire on the lithium battery negative electrode material in the inner bag, and is highly practical and worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an isometric structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention (partially enlarged on the outer bag);

[0024] Figure 3 Schematic diagram of the connection structure between the top plate and the support tube of the present invention (the isolation inner plate is inside the isolation outer plate);

[0025] Figure 4 Schematic diagram of the connection structure between the top plate and the support tube of the present invention (the isolation inner plate slides out of the isolation outer plate);

[0026] Figure 5 This is a schematic diagram of the connection structure of the isolation inner panel and the isolation outer panel of the present invention (when the polyurethane block is not melted);

[0027] Figure 6 This is a schematic cross-sectional view of the connection between the top plate and the support tube of the present invention.

[0028] In the figure: 1 outer bag, 2 inner bag, 3 clamping ring, 4 cover plate, 5 vacuum pump, 6 insulation protective layer 1, 7 aluminum foil, 8 insulation protective layer 2, 9 adhesive layer, 10 top plate, 11 support tube, 12 handle, 13 vacuum chamber, 14 sealing block, 15 one-way air valve 1, 16 one-way air valve 2, 17 return spring, 18 movable slide, 19 isolation outer plate, 20 isolation inner plate, 21 drive spring, 22 flame retardant, 23 polyurethane block, 1201 sealing block. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-6 , the present invention provides a technical solution:

[0031] A high temperature resistant aluminum foil composite packaging bag for lithium battery negative electrode materials, as shown in the instructions Figure 1 As shown, including:

[0032] The outer bag 1 is used to place the inner bag 2 and protect the inner bag 2. A closing component for closing the outer bag 1 is provided above the outer bag 1;

[0033] The outer bag 1 is provided with a material port. When loading (negative electrode material), the inner bag 2 is turned over to the outside of the material port. The closing assembly includes a snap ring 3, a cover plate 4 and an air pump 5. The snap ring 3 is provided at the material port. In this embodiment, the snap ring 3 is installed on the top plate 10. The snap ring 3 is provided with a thread. The inner side of the cover plate 4 is correspondingly provided with a thread. A rubber sealing ring is provided inside the cover plate 4. When the cover plate 4 is rotated and tightened on the snap ring 3, the rubber block is at this time in the cover plate 4 and the snap ring 3 bracket for sealing. The cover plate 4 and the snap ring 3 are arranged corresponding to each other. By rotating The cover plate 4 can be fixedly connected to the clamping ring 3, and the air pump 5 is arranged on the cover plate 4. The air pump 5 is used to extract the air between the outer bag 1 and the inner bag 2 to the outside after the cover plate 4 and the clamping ring 3 seal the outer bag 1. The air pump 5 is movably connected to the cover plate 4. The air pump 5 extracts the air between the outer bag 1 and the inner bag 2 through a one-way air valve. After the extraction is completed, the air pump 5 is removed to complete the packaging; the inner bag 2 is arranged inside the outer bag 1. The inner bag 2 is used to seal and store the negative electrode material of the lithium battery (such as graphite, etc.), and the inner bag 2 is made of aluminum foil.

[0034] Protective component 1 is connected to the inner wall of outer bag 1 and consists of five layers: from outside to inside, insulating protective layer 1 (6) for insulating the negative electrode material; aluminum foil 7 for moisture and heat insulation; insulating protective layer 2 (8) for secondary insulation of the negative electrode material; and adhesive layers 9 on either side of aluminum foil 7 for adhering insulating protective layer 1 (6) and insulating protective layer 2 (8). Aluminum foil 7 is conventional and can be customized based on user needs. Insulating protective layer 1 (6) is made of nylon. Aluminum foil 7 is highly wear-resistant and flexible, lightweight, inexpensive to produce, and easily foldable, making it less susceptible to damage from scratches. Insulating protective layer 2 (8) is made of polypropylene film, which has strong sealing properties and a high surface resistance, providing anti-static properties.

[0035] The support frame is used to support the outer bag 1. The support frame includes a top plate 10 and a support tube 11. The support tube 11 is connected to the top plate 10. The top plate 10 is used to prevent the top from catching fire by isolating the ground when a fire occurs. The support tube 11 is used to support the outer bag 1;

[0036] The lifting assembly includes a handle 12 and an air extraction mechanism. The handle 12 is connected to the support tube 11. The handle 12 is used to lift the outer bag 1. By pulling the handle 12, the air extraction mechanism is driven to extract the air inside the outer bag 1.

[0037] The support tube 11 is provided with an air extraction chamber 13, which is used to cooperate with the sealing block 14 to extract the air between the outer bag 1 and the inner bag 2 to the outside of the outer bag 1. The handle 12 is made of nylon rope. The air extraction mechanism includes a sealing block 14, a one-way air valve 15, a one-way air valve 2 16 and a return spring 17. One end of the handle 12 is connected to the sealing block 14, which is a rubber block. The sealing block 14 is used to cooperate with the air extraction chamber 13 to transmit gas. The sealing block 14 is slidably connected to the air extraction chamber 13. The one-way air valve 15 is connected to the one-way air valve 2 16 and the return spring 17. 5 and the one-way air valve 2 16 are both connected to the support tube 11, the one-way air valve 1 15 is used to transport the air in the outer bag 1 to the air pumping chamber 13, the one-way air valve 2 16 is also connected to the side wall of the outer bag 1, the one-way air valve 2 16 is used to transport the air in the air pumping chamber 13 to the outside of the outer bag 1, the return spring 17 is a tension spring, that is, when no external force acts on the handle 12, the handle 12 will always be kept in the storage state (at this time, most of the handle 12 is in the air pumping chamber 13), and the two ends of the return spring 17 are respectively connected to the air pumping chamber 13 and the sealing block 14.

[0038] Protection component 2 is connected to the support frame and includes a fuse mechanism and a protection mechanism. When the ambient temperature around the outer bag 1 melts the fuse mechanism, the protection mechanism will isolate the outer bag 1 and provide temperature reduction protection;

[0039] A movable chute 18 is provided on the side wall of the support tube 11. The movable chute 18 is used to limit the movement of the isolation inner plate 20 so that the isolation inner plate 20 can only move along the inside of the movable chute 18. The protective mechanism includes an isolation outer plate 19, an isolation inner plate 20, a drive spring 21 and a flame retardant 22. The isolation outer plate 19 and the isolation inner plate 20 are flame-retardant polycarbonate plates (such as styrene resin material). The isolation outer plate 19 is symmetrically arranged on both sides of the movable chute 18 and is fixedly connected to the side wall of the movable chute 18. The isolation outer plate 19 is used to install the isolation inner plate 20, the drive spring 21 and the fuse mechanism. The isolation inner plate 20 is movably inserted into the isolation outer plate 19. A leakage port is provided at the bottom of the isolation inner plate 20. The leakage port is blocked by a block made of polyurethane material, and the block will melt at high temperature. Thereby, the flame retardant can flow out of the groove better and reach between the outer bag 1 and the inner bag 2. The isolation outer plate 19 and the isolation inner plate 20 cooperate with each other to prevent the flame retardant 22 from falling between the inner bag 2 and the outer bag 1 in the absence of a fire. The isolation inner plate 20 is slidably connected to the movable slide 18. A groove is provided inside the isolation inner plate 20, and the flame retardant 22 is provided in the groove. The flame retardant 22 is used to absorb heat when the temperature is too high. The two ends of the driving spring 21 are respectively connected to the isolation inner plate 20 and the isolation outer plate 19. The driving spring 21 is used to drive the isolation inner plate 20 to move along the movable slide 18. The driving spring 21 is a compression spring, that is, the isolation inner plate 20 can be pushed out of the isolation outer plate 19 without a fuse mechanism. The fuse mechanism is used to fix the driving spring 21 at normal temperature.

[0040] The end of the handle 12 away from the sealing block 14 is connected to the isolation inner plate 20. Two sealing blocks 1201 are provided at the connection between the handle 12 and the isolation inner plate 20. The sealing blocks 1201 are used to prevent the airtightness between the outer bag 1 and the inner bag 2 when the handle 12 moves along the support tube 11. When the isolation inner plate 20 moves to the bottom of the movable slide groove 18, it will drive the part of the handle 12 extending to the outside of the support tube 11 to enter the support tube 11, thereby receiving the part of the handle 12 exposed to the support tube 11 into the support tube 11 for protection, thereby preventing the handle 12 from catching fire.

[0041] The fuse mechanism is a polyurethane block 23, which is made of polyurethane. Polyurethane is in a solidified form at room temperature, thereby fixing the compressed drive spring 21. When exposed to high temperatures, the polyurethane melts and forms a viscous liquid. At this time, it can flow and cover the gap between the inner bag 2 and the outer bag 1, forming a flame retardant layer. The drive spring 21 is arranged inside the polyurethane block 23. The drive spring 21 is fixedly connected to the polyurethane block 23 at room temperature. The polyurethane block 23 is used to fix the drive spring 21 at room temperature to ensure that the isolation inner plate 20 is inside the isolation outer plate 19 at room temperature. The flame retardant 22 is polyurethane particles. When exposed to high temperatures, the polyurethane melts and forms a viscous liquid. At this time, it can flow and cover to form a flame retardant layer, effectively isolating the fire source from the negative electrode material.

[0042] Working principle: When in use, first place the bag opening of the inner bag 2 to the clamping ring 3, then hang the outer bag 1 under the discharger through the handle 12, start the discharger to inject the negative electrode material of the lithium battery into the inner bag 2, and after injecting a specified amount of negative electrode material into the inner bag 2, first seal and pack the inner bag 2, and then fix the cover plate 4 to the clamping block by rotation, start the vacuum pump 5 to extract the air between the outer bag 1 and the inner bag 2, and then remove the vacuum pump 5 to complete the packaging of the negative electrode material; when the packaged negative electrode material is subsequently transported, when the crane lifts the outer bag 1 through the handle 12, the sealing block 14 will move along the vacuum chamber 13, and at this time, the air that has not been extracted between the outer bag 1 and the inner bag 2 will enter the vacuum chamber 13 set with the four support tubes 11 through the one-way air valve 15 (if there is no air, the sealing block 14 will be in the vacuum chamber 13 due to atmospheric pressure). There will be no movement during the lifting process, which will not be described in detail here), and the return spring 17 is stretched at this time. When the lifting is completed and the outer bag 1 is put down, since the handle 12 is not under force, the return spring 17 rebounds and discharges the air in the vacuum chamber 13, further completing the extraction of air between the inner bag 2 and the outer bag 1; when a fire occurs, the fire will only ignite the outermost insulating protective layer 6 (nylon layer) of the outer bag 1. When the aluminum foil 7 of the outer bag 1 is heated at high temperature, the aluminum foil 7 will play a heat insulating role, and when heated to a certain temperature, the polyurethane will melt. At this time, the driving spring 21 will drive the inner plate to descend, thereby closing the entire outer bag 1 for heat insulation protection, and the flame retardant 22 arranged in the groove of the inner partition will also melt into the gap between the inner partition and the outer partition, thereby forming a complete and closed flame retardant protective shell for the outer bag 1 to prevent the fire from affecting the internal negative electrode material. In addition, since the end of the handle 12 away from the sealing block 14 is connected to the isolation inner plate 20, when the driving spring 21 drives the isolation inner plate 20 to move, it also drives the handle 12 to retract into the support tube 11 to prevent the handle 12 from burning.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant lithium battery negative electrode material aluminum foil composite packaging bag, characterized in that: include: An outer bag, wherein a closing assembly for closing the outer bag is provided above the outer bag; A protective component 1 connected to the inner wall of the outer bag, the protective component 1 having a five-layer structure, comprising, from the outside to the inside, an insulating protective layer 1 for insulating the negative electrode material, an aluminum foil for moisture-proof and heat-insulating, an insulating protective layer 2 for secondary insulation protection of the negative electrode material, and adhesive layers disposed on both sides of the aluminum foil for adhering the insulating protective layer 1 and the insulating protective layer 2; A support frame, comprising a top plate and a support tube, wherein the support tube is connected to the top plate and is used to support the outer bag; A lifting assembly, comprising a handle and an exhaust mechanism, wherein the handle is connected to the support tube and is used to lift the outer bag. By pulling the handle, the exhaust mechanism is driven to extract the air from the outer bag; A second protection component connected to the support frame includes a fuse mechanism and a protection mechanism. When the ambient temperature around the outer bag melts the fuse mechanism, the protection mechanism isolates the outer bag and provides temperature protection; and An inner bag, the inner bag being arranged inside the outer bag and used for sealing and storing the negative electrode material of the lithium battery; An air pumping cavity is provided inside the support tube, the handle is made of nylon rope, the air pumping mechanism includes a sealing block, a one-way air valve 1, a one-way air valve 2 and a return spring, one end of the handle is connected to the sealing block, the sealing block is slidably connected to the air pumping cavity, the one-way air valve 1 and the one-way air valve 2 are both connected to the support tube, the one-way air valve 1 is used to transport the air in the outer bag to the air pumping cavity, the one-way air valve 2 is also connected to the side wall of the outer bag, the one-way air valve 2 is used to transport the air in the air pumping cavity to the outside of the outer bag, and both ends of the return spring are respectively connected to the air pumping cavity and the sealing block; The side wall of the support tube is provided with a movable slide groove, and the protective mechanism includes an isolation outer plate, an isolation inner plate, a driving spring and a flame retardant. The isolation outer plate is symmetrically arranged on both sides of the movable slide groove and is fixedly connected to the side wall of the movable slide groove. The isolation inner plate is movably inserted into the isolation outer plate, and the isolation inner plate is slidably connected to the movable slide groove. A groove is provided inside the isolation inner plate, and the flame retardant is provided in the groove. The two ends of the driving spring are respectively connected to the isolation inner plate and the isolation outer plate. The driving spring is used to drive the isolation inner plate to move along the movable slide groove, and the fuse mechanism is used to fix the driving spring at normal temperature.

2. The aluminum foil composite packaging bag for high-temperature resistant lithium battery negative electrode materials according to claim 1, characterized in that: The outer bag is provided with a material port, and the closing assembly includes a snap ring, a cover plate and an air pump. The snap ring is provided at the material port, and the cover plate and the snap ring are provided corresponding to each other. The cover plate can be fixedly connected to the snap ring by rotation. The air pump is provided on the cover plate, and the air pump is used to extract air between the outer bag and the inner bag to the outside.

3. The aluminum foil composite packaging bag for high temperature resistant lithium battery negative electrode material according to claim 1, characterized in that: The insulating protective layer 1 is made of nylon material.

4. The aluminum foil composite packaging bag for high-temperature resistant lithium battery negative electrode materials according to claim 1, characterized in that: The second insulating protective layer is a polypropylene film.

5. The aluminum foil composite packaging bag for high temperature resistant lithium battery negative electrode material according to claim 1, characterized in that: One end of the handle away from the sealing block is connected to the isolation inner plate. When the isolation inner plate moves to the bottom of the movable chute, it drives the portion of the handle extending outside the support tube to enter the support tube.

6. The aluminum foil composite packaging bag for high temperature resistant lithium battery negative electrode material according to claim 5, characterized in that: The fuse mechanism is a polyurethane block, a part of the drive spring is arranged inside the polyurethane block, and the drive spring is fixedly connected to the polyurethane block at normal temperature. The polyurethane block is used to fix the drive spring at normal temperature to ensure that the isolation inner plate is inside the isolation outer plate at normal temperature.

7. The aluminum foil composite packaging bag for high temperature resistant lithium battery negative electrode material according to claim 1, characterized in that: The flame retardant is polyurethane particles.

8. The aluminum foil composite packaging bag for high temperature resistant lithium battery negative electrode material according to claim 1, characterized in that: The inner bag is made of aluminum foil.

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