High moisture-proof liquid packaging barrel
By using packaging barrels made of multi-layer composite materials, the problems of heavy weight and insufficient water-proofing capacity of electrolyte packaging barrels in the prior art have been solved. This achieves lightweight and efficient water vapor barrier, reduces transportation costs, and ensures the quality and safety of the electrolyte.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG RES INST OF CHEM IND CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-05-12
AI Technical Summary
Existing electrolyte packaging containers are bulky and lack sufficient water resistance, resulting in high transportation costs and affecting the performance and safety of the electrolyte.
The packaging drum is made of multi-layer composite materials, including a fluoropolymer layer and a polyolefin layer, to block moisture. Combined with sealing methods such as threaded engagement or heat sealing, it ensures the airtightness of the drum body and lid.
The weight of the packaging drum was reduced, the moisture barrier properties were improved, transportation costs were reduced, and the quality and safety of the electrolyte were ensured.
Smart Images
Figure CN224225747U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid transportation and preservation technology, specifically a highly water-resistant liquid packaging barrel made of polymer material. Background Technology
[0002] In lithium-ion batteries, the electrolyte is the core medium connecting the positive and negative electrodes, enabling the battery's charging and discharging functions by conducting lithium ions. This electrolyte is a complex mixture made from high-purity organic solvents, lithium electrolyte salts, and specific additives in precise proportions. It plays a crucial role in battery performance, directly affecting energy density, power output, cycle life, and overall safety. Because the electrolyte is highly sensitive to moisture, even trace amounts can significantly impact its quality, thereby affecting battery performance. Therefore, strict measures must be taken to prevent moisture ingress during the storage and transportation of the electrolyte.
[0003] Currently, the industry commonly uses a technique where the prepared electrolyte is filled into sealed stainless steel containers in an inert gas (such as argon or nitrogen) environment. These stainless steel containers are not only sturdy and durable but also have good corrosion resistance, effectively protecting the electrolyte from external environmental interference. However, they have significant inherent drawbacks: ① The material density is as high as 7.9 g / cm³. 3 ① The low transport payload ratio increases transportation costs; ② The cost of 316L stainless steel exceeds 20,000 yuan per ton. This undoubtedly increases the cost of electrolyte and battery.
[0004] To address the aforementioned issues, patent CN211686335U discloses an aluminum-plastic composite film packaging bag for lithium battery materials. The packaging bag includes a bag body, a gas phase interface, and a material interface. The bag body comprises an outer layer, a middle layer, and an inner layer, sequentially laminated together. The middle layer is an aluminum foil layer, and the outer and inner layers are polymer film layers. The gas phase interface is heat-sealed on the top outer side of the bag body and penetrates through the outer, middle, and inner layers, communicating with the inner cavity of the bag body. The material interface is heat-sealed on the bottom outer side of the bag body and penetrates through the outer, middle, and inner layers, communicating with the inner cavity of the bag body. Switch valves are installed on both the gas phase interface and the material interface. However, the portion of the inner layer in contact with the electrolyte is not resistant to swelling, affecting the quality of the electrolyte.
[0005] In addition, IBC (Intermediate Bulk Container) containers made of high-density polyethylene are lighter than those made of stainless steel, but their water vapor permeability is as high as 0.3-0.4 g·mil / 100in. 2 ·d, which cannot meet the transportation requirements of lithium-ion battery electrolytes, especially during long-term transportation of electrolytes, this high permeability may cause the electrolyte to absorb moisture and deteriorate, thereby affecting its performance and safety.
[0006] To prevent moisture from entering the packaging drum, it is necessary to study the packaging drum itself. Utility Model Content
[0007] In view of the problems of large weight and insufficient water-proofing capacity of existing electrolyte packaging barrels, this utility model provides a highly water-proof vapor-liquid packaging barrel, which aims to solve the shortcomings of the existing technology.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A highly waterproof liquid packaging barrel, the packaging barrel comprising a barrel body and a barrel lid,
[0010] The top of the barrel is equipped with a liquid inlet, the side of the barrel is equipped with a quality inspection port and a drain port, and the interior of the barrel is equipped with a spray device.
[0011] During use, the barrel body and the barrel lid engage with each other.
[0012] The barrel body and lid are made of multi-layer composite material, which includes at least a first layer and a second layer. The first layer faces the inside of the packaging barrel, and the second layer faces the outside of the packaging barrel. The first layer is made of fluoropolymer, and the second layer is made of polyolefin.
[0013] The fluoropolymer is selected from one or more of perfluoroalkoxy polymers, ethylene-trifluorochloroethylene copolymers, polychlorotrifluoroethylene, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymers, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymers, fluorinated ethylene propylene copolymers, polyvinylidene fluoride, and polyvinylidene fluoride. From the perspective of isolating moisture from the packaging container, preferably, the fluoropolymer is selected from one or more of perfluoroalkoxy polymers, polytetrafluoroethylene, polychlorotrifluoroethylene, and ethylene-trifluorochloroethylene copolymers. Due to their unique molecular structure and low surface energy, fluoropolymers effectively prevent the penetration of external moisture.
[0014] The polyolefin is selected from one or more of high-density polyethylene, ultra-high-density polyethylene, fluorinated polyethylene, ultra-high molecular weight high-density polyethylene, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, cross-linked polyethylene, polypropylene, polyolefin elastomers, polyolefin plastics, ethylene-vinyl acetate copolymers, poly-1-butene, poly-4-methyl-1-pentene layers, and cyclic olefin copolymers. From the perspective of supporting the main body of the packaging barrel, preferably, the polyolefin is selected from one or more of high-density polyethylene and ultra-high molecular weight high-density polyethylene. The second layer of polyolefin serves as the main structure of the packaging barrel, providing crucial support for its mechanical properties.
[0015] The thickness of the first layer is 1µm-500µm. Preferably, the thickness of the first layer is 20µm-200µm.
[0016] The thickness of the second layer is 0.5mm-3mm. Preferably, the thickness of the second layer is 1mm-2mm.
[0017] Furthermore, the multilayer composite material further includes a third layer, which is located outside the second layer and faces the outside of the packaging drum. The third layer is selected from one of the following: a polyurethane layer, a polystyrene layer, a vacuum insulation board layer, an aerogel layer, a glass wool layer, a rock wool layer, an aluminum silicate wool layer, an expanded perlite layer, a cement foam board layer, and a foam glass board layer. Preferably, the third layer is selected from one of the following: a polyurethane layer, an aerogel layer, a rock wool layer, and an aluminum silicate wool layer.
[0018] Furthermore, the multilayer composite material further includes an adhesive layer located between the first layer and the second layer. The adhesive layer is selected from one of the following: epoxy resin adhesive layer, polyurethane adhesive layer, α-cyanoacrylate adhesive layer, hot melt adhesive layer, acrylic adhesive layer, modified phenolic adhesive layer, inorganic adhesive layer, α-lipoic acid polymer adhesive layer, polyoxometalate (POMs)-based solvent-free adhesive layer, and polymer resin (such as VINNOL L-6868) adhesive layer. Preferably, the adhesive layer is selected from one of the following: epoxy resin adhesive layer, polyurethane adhesive layer, polyoxometalate (POMs)-based solvent-free adhesive layer, and polymer resin (such as VINNOL L-6868) adhesive layer.
[0019] The thickness of the adhesive layer is less than 1 mm. Preferably, the thickness of the adhesive layer is less than 0.2 mm.
[0020] The method of engagement between the barrel body and the lid is arbitrary, as long as the barrel body and lid fit snugly and the liquid does not leak out. Furthermore, it is acceptable that neither liquid leaks out nor moisture enters. The method of engagement between the barrel body and the lid can be threaded engagement, snap-fit engagement, heat sealing / ultrasonic connection, adhesive engagement, etc. Preferably, it is threaded engagement or heat sealing / ultrasonic connection.
[0021] Furthermore, the packaging barrel also includes a limiting member, with limiting holes provided at the upper end of the barrel body and the lower end of the barrel lid, and the limiting member and the limiting hole can engage with each other.
[0022] Furthermore, the packaging barrel also includes a buckle, which is located at the lower end of the barrel lid, and a slot is provided at the upper end of the barrel body, wherein the buckle and the slot on the barrel body can engage with each other.
[0023] Furthermore, the packaging barrel also includes a barrier ring located at the joint between the barrel body and the lid, the purpose of which is to seal the barrel body and the lid to prevent air or water leakage at the joint.
[0024] The volume of the packaging barrel is arbitrary. From an economic perspective, the volume of the packaging barrel is greater than 100L. Preferably, the volume of the packaging barrel is 200-1000L.
[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: using polyolefin packaging barrels instead of stainless steel packaging barrels greatly reduces the weight of the packaging barrels, making them easier to move and transport; in addition, introducing a fluoropolymer layer on the polyolefin packaging barrels greatly increases the water vapor barrier properties of the polyolefin packaging barrels, solving the problem of excessive water vapor permeability of polyolefin packaging barrels. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of a highly water-resistant liquid packaging barrel according to the present invention;
[0027] Figure 2 This is a schematic diagram of the structure of a high-water-proof liquid packaging barrel according to the present invention;
[0028] Figure 3 This is a schematic diagram of the structure of a high water-barrier liquid packaging barrel lid according to the present invention;
[0029] Figure 4 This is a schematic diagram of the structure of a high-water-proof liquid packaging barrel (with an adhesive layer) according to the present invention;
[0030] Figure 5 This is a schematic diagram of the structure of a high-water-barrier liquid packaging barrel lid (with an adhesive layer) according to the present invention;
[0031] Figure 6 This is a schematic diagram of the structure of a limiting component for a high-barrier water vapor liquid packaging barrel according to this utility model.
[0032] In the above diagram: 1 is the barrel body, 2 is the barrel lid, 10 and 27 are the third layer, 11 and 21 are the second layer, 12 and 22 are the first layer, 13 and 23 are the adhesive layer, 14 and 24 are the limiting holes, 15 is the thread, 16 is the feed port, 17 is the drain port, 18 is the quality inspection port, 19 and 20 are the spraying devices (19 is the spray pipe, 20 is the spray ball), 25 is the barrier ring, 26 is the thread, 31 is the limiting post, 32 is the spring, 33 is the connecting ring, and 34 is the lever. Detailed Implementation
[0033] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.
[0034] Example 1
[0035] like Figure 1-3 A highly waterproof liquid packaging barrel, comprising the following structure:
[0036] Barrel 1: Barrel 1 is coated with a second layer 11 and a first layer 12. The second layer 11 is made of high-density polyethylene to improve the strength of the packaging barrel and reduce manufacturing costs; the first layer 12 is a polychlorotrifluoroethylene layer, which has good water-resistant properties and can effectively prevent water vapor penetration that could lead to liquid deterioration, such as electrolyte deterioration. Multiple limiting holes 14 arranged in a ring array are provided on the upper circumference of barrel 1. The top of the barrel is provided with threads 15 and a feed inlet 16 for easy filling and extraction of liquids, such as electrolytes. The sides of the barrel are provided with a liquid drain outlet 17 (electrolyte drain) and a quality inspection port 18, used for liquid transfer and quality inspection, respectively. The interior of the barrel is equipped with a spray device, including spray pipes 19 and spray balls 20, for easy cleaning of the packaging barrel and enabling reuse.
[0037] Bucket lid 2: The second layer 21 is a high-density polyethylene layer, and the first layer 22 is a polychlorotrifluoroethylene layer, which has good water-resistant properties. The lower inner side of the bucket lid 2 is connected to the bucket body 1 by threads 26 for sealing and barrier. Multiple limiting holes 24 are provided in a ring array on the lower circumference of the bucket lid 2, and a barrier ring 25 made of polychlorotrifluoroethylene is provided below. The barrier ring 25 is for sealing between the bucket body and the bucket lid, preventing air and water leakage at the interface, and ensuring the barrier and leak-proof performance at the connection between the bucket lid 2 and the bucket body 1.
[0038] Instructions for using the packaging drum: Connect the drum lid 2 to the drum body 1 using the limiting member 3 until the barrier ring 25 on the drum lid 2 is inserted into the thread 15 on the drum body 1, and tighten to seal. Connect the liquid, such as electrolyte, filling device pipeline to the sampling port 16 on the top of the drum body for liquid, such as electrolyte, filling. After filling, transport the liquid, such as electrolyte. Take a sample at the quality inspection port 18 on the side of the drum body for liquid, such as electrolyte, quality testing. Unload the liquid, such as electrolyte, at the drain port 17 to complete the transfer. Clean the packaging drum using the spray pipe 19 and spray ball 20 for reuse.
[0039] Example 2
[0040] like Figure 1 , Figure 4 , Figure 5 The main difference from Example 1 lies in the structure of the barrel body and lid. Both the barrel body 1 and the lid 2 consist of three layers:
[0041] Barrel body 1: The second layer 11 is high-density polyethylene, the adhesive layer 13 is adhesive, and the first layer 12 is polychlorotrifluoroethylene.
[0042] Bucket lid 2: The second layer 21 is high-density polyethylene, the adhesive layer 23 is adhesive, and the first layer 22 is polychlorotrifluoroethylene.
[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A highly waterproof liquid packaging barrel, characterized in that: The packaging barrel includes a barrel body and a barrel lid. The top of the barrel is equipped with a liquid inlet, the side of the barrel is equipped with a quality inspection port and a drain port, and the interior of the barrel is equipped with a spray device. During use, the barrel body and the barrel lid engage with each other. The barrel body and lid are made of multi-layer composite material, which includes at least a first layer and a second layer. The first layer faces the inside of the packaging barrel, and the second layer faces the outside of the packaging barrel. The first layer is made of fluoropolymer, and the second layer is made of polyolefin.
2. The high-barrier liquid packaging barrel according to claim 1, characterized in that: The thickness of the first layer is 1um-500um.
3. The high-barrier liquid packaging barrel according to claim 1, characterized in that: The thickness of the second layer is 0.5mm-3mm.
4. The high-barrier liquid packaging barrel according to claim 1, characterized in that: The multilayer composite material further includes a third layer, which is outside the second layer and faces the outside of the packaging barrel. The third layer is selected from one of the following: polyurethane layer, polystyrene layer, vacuum insulation board layer, aerogel layer, glass wool layer, rock wool layer, aluminum silicate wool layer, expanded perlite layer, cement foam board layer, and foam glass board layer.
5. The high-barrier water vapor liquid packaging barrel according to claim 1, characterized in that: The multilayer composite material further includes an adhesive layer located between the first layer and the second layer. The adhesive layer is selected from one of the following: epoxy resin adhesive layer, polyurethane adhesive layer, α-cyanoacrylate adhesive layer, hot melt adhesive layer, acrylic adhesive layer, modified phenolic adhesive layer, inorganic adhesive layer, α-lipoic acid polymer adhesive layer, multimetal oxide cluster solvent-free adhesive layer, and polymer resin adhesive layer.
6. The high-barrier water vapor liquid packaging barrel according to claim 5, characterized in that: The thickness of the adhesive layer is less than 1 mm.
7. The high-barrier liquid packaging barrel according to claim 1, characterized in that: The barrel body and the barrel lid are engaged by means of threaded engagement, snap-fit engagement, heat sealing / ultrasonic engagement, or adhesive engagement.
8. The high-barrier water vapor liquid packaging barrel according to claim 1, characterized in that: The packaging barrel also includes a limiting component, with limiting holes provided at the upper end of the barrel body and the lower end of the barrel lid, and the limiting component and the limiting holes can engage with each other.
9. The high-barrier water vapor liquid packaging barrel according to claim 1, characterized in that: The packaging barrel also includes a buckle, which is located at the lower end of the barrel lid. A slot is provided at the upper end of the barrel body, and the buckle and the slot on the barrel body can engage with each other.
10. The high-barrier liquid packaging barrel according to claim 1, characterized in that: The volume of the packaging barrel is greater than 100L.