CN-224225747-U - High-water-vapor-isolation liquid packaging barrel

CN224225747UCN 224225747 UCN224225747 UCN 224225747UCN-224225747-U

Abstract

The utility model discloses a high-water vapor-isolation liquid packaging barrel which comprises a barrel body and a barrel cover, wherein a liquid feeding hole is formed in the top of the barrel body, a quality detection hole and a liquid discharging hole are formed in the side face of the barrel body, a spraying device is arranged in the barrel body, the barrel body and the barrel cover are mutually clamped when the packaging barrel is used, the barrel body and the barrel cover are made of multi-layer composite materials, the multi-layer composite materials at least comprise a first layer and a second layer, the first layer faces the inside of the packaging barrel, the second layer faces the outside of the packaging barrel, the first layer is made of fluorine-containing polymers, and the second layer is made of polyolefin. The utility model uses the polyolefin packaging barrel to replace the stainless steel packaging barrel, greatly reduces the weight of the packaging barrel, is beneficial to moving and transportation, and additionally introduces the fluorine-containing polymer layer on the polyolefin packaging barrel, greatly increases the water vapor barrier property of the polyolefin packaging barrel and solves the problem of overhigh water vapor transmittance of the polyolefin packaging barrel.

Inventors

MA GUOQIANG
JIANG BIN
FU CHAOPENG
JING SHUI
YE XIN
ZHANG ZHONGTING
LU YANGTIAN

Assignees

浙江省化工研究院有限公司
中化蓝天集团有限公司
宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250423

Claims (10)

1. A packaging barrel for liquid with high water vapor isolation is characterized in that the packaging barrel comprises a barrel body and a barrel cover, The top of the barrel body is provided with a liquid feeding port, the side surface of the barrel body is provided with a quality detection port and a liquid discharge port, the inside of the barrel body is provided with a spraying device, When in use, the barrel body and the barrel cover are mutually clamped, The barrel body and the barrel cover are made of multi-layer composite materials, the multi-layer composite materials at least comprise a first layer and a second layer, the first layer faces the inside of the packaging barrel, the second layer faces the outside of the packaging barrel, the first layer is made of fluorine-containing polymer, and the second layer is made of polyolefin.
2. The highly water vapor resistant liquid packaging barrel of claim 1 wherein said first layer has a thickness of 1um to 500um.
3. The highly water vapor resistant liquid packaging barrel of claim 1 wherein said second layer has a thickness of 0.5mm to 3mm.
4. The packaging barrel for highly water vapor barrier liquid of claim 1, wherein the multi-layer composite material further comprises a third layer, the third layer being outside the second layer and facing the outside of the packaging barrel, the third layer being one selected from the group consisting of a polyurethane layer, a polystyrene layer, a vacuum insulation panel layer, an aerogel layer, a glass wool layer, a rock wool layer, an aluminum silicate wool layer, an expanded perlite layer, a cement foam panel layer, and a foam glass panel layer.
5. The high moisture vapor barrier liquid packaging barrel of claim 1, wherein the multi-layer composite material further comprises an adhesive layer positioned between the first layer and the second layer, wherein the adhesive layer is one of an epoxy adhesive layer, a polyurethane adhesive layer, an alpha-cyanoacrylate adhesive layer, a hot melt adhesive layer, an acrylic adhesive layer, a modified phenolic adhesive layer, an inorganic adhesive layer, an alpha-lipoic acid polymer adhesive layer, a multi-metal oxygen cluster-based solvent-free adhesive layer, and a polymer resin adhesive layer.
6. The packaging barrel for highly water vapor-proof liquid of claim 5, wherein the thickness of the adhesive layer is less than 1mm.
7. The packaging barrel for highly water vapor-proof liquid of claim 1, wherein the barrel body and the barrel cover are mutually clamped in a mode selected from the group consisting of threaded clamping, heat sealing/ultrasonic clamping and adhesive clamping.
8. The packaging barrel for highly water vapor-proof liquid of claim 1, further comprising a limiting piece, wherein limiting holes are formed in the upper end of the barrel body and the lower end of the barrel cover, and the limiting piece and the limiting holes can be mutually clamped.
9. The packaging barrel for highly water vapor-proof liquid of claim 1, further comprising a buckle, wherein the buckle is arranged at the lower end of the barrel cover, a clamping groove is formed in the upper end of the barrel body, and the buckle and the clamping groove on the barrel body can be mutually clamped.
10. The packaging barrel for highly water-proof liquid according to claim 1, wherein the volume of the packaging barrel is more than 100L.

Description

High-water-vapor-isolation liquid packaging barrel Technical Field The utility model relates to the technical field of liquid transportation and preservation, in particular to a high-water vapor-isolation liquid packaging barrel made of polymer materials. Background In lithium ion batteries, the electrolyte is the core medium connecting the positive and negative electrodes, and it realizes the charge and discharge functions of the battery by conducting lithium ions. The electrolyte is a complex mixture prepared from high-purity organic solvent, electrolyte lithium salt and specific additives according to precise proportions. It plays an extremely critical role in the performance of the battery, directly affecting the energy density, power output, cycle life and overall safety performance of the battery. Since the electrolyte is very sensitive to moisture, trace moisture can have a great influence on the quality of the electrolyte, thereby affecting the performance of the battery. Therefore, in the storage and transportation links of the electrolyte, strict measures must be taken to prevent moisture from entering. At present, the technology commonly adopted in the industry is to fill the prepared electrolyte into a sealing packaging barrel made of stainless steel under the protection of inert gas (such as argon or nitrogen). The stainless steel barrel is firm and durable, has good corrosion resistance and can effectively protect electrolyte from being interfered by external environment. However, the inherent defects are obvious, the ① material density is as high as 7.9g/cm 3, the transport payload ratio is low, the transport cost is increased, and the single ton cost of ② L stainless steel exceeds 2 ten thousand yuan. This clearly increases the cost of the electrolyte, the battery. In order to solve the problems, patent CN211686335U discloses an aluminum-plastic composite film packaging bag for lithium battery materials, the packaging bag comprises a bag body, a gas phase interface and a material interface, the bag body comprises an outer layer, an intermediate layer and an inner layer which are sequentially compounded, the intermediate layer is an aluminum foil layer, the outer layer and the inner layer are polymer film layers, the gas phase interface is heat-sealed on the outer side of the top of the bag body and penetrates through the outer layer, the intermediate layer and the inner layer to be communicated with the inner cavity of the bag body, the material interface is heat-sealed on the outer side of the bottom of the bag body and penetrates through the outer layer, the intermediate layer and the inner layer to be communicated with the inner cavity of the bag body, and switching valves are arranged on 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, and has an influence on the quality of the electrolyte. In addition, the ton barrel (IBC ton barrel) made of high-density polyethylene is lighter than stainless steel in mass, but the water vapor transmittance is as high as 0.3-0.4 g/mil/100 in 2 d, so that the transportation requirement of the electrolyte of the lithium ion battery cannot be met, and particularly in the process that the electrolyte needs to be transported for a long time, the high transmittance can cause the electrolyte to absorb moisture and deteriorate, thereby affecting the performance and the safety of the electrolyte. In order to prevent moisture from entering the packaging barrel, it is necessary to study the packaging barrel. Disclosure of utility model Aiming at the problems of large quality, insufficient water-proof capacity and the like of the existing electrolyte packaging barrel, the utility model provides a high-water-vapor-proof liquid packaging barrel, and aims to solve the defects in the prior art. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A packaging barrel for high-water vapor-isolation liquid, which comprises a barrel body and a barrel cover, The top of the barrel body is provided with a liquid feeding port, the side surface of the barrel body is provided with a quality detection port and a liquid discharge port, the inside of the barrel body is provided with a spraying device, When in use, the barrel body and the barrel cover are mutually clamped, The barrel body and the barrel cover are made of multi-layer composite materials, the multi-layer composite materials at least comprise a first layer and a second layer, the first layer faces the inside of the packaging barrel, the second layer faces the outside of the packaging barrel, the first layer is made of fluorine-containing polymer, and the second layer is made of polyolefin. The fluorine-containing polymer is selected from one or more of perfluoroalkoxy polymer, ethylene-chlorotrifluoroethylene copolymer, polytrifluoroethylene, polytetrafluoroethylene,