Production Process and process of Lithium Battery

The composition of aluminum plastic packaging film(referred to as aluminum plastic film) is shown in the figure. The cross section shows three layers of composition: nylon layer, Al layer and PP layer.

Each of the three layers has its own role. First, the nylon layer guarantees the shape of the aluminum plastic film and ensures that the film will not deform before the lithium ion battery is made.

The Al layer is a layer of metal Al that prevents water from infiltrating. Lithium-ion batteries are very afraid of water, and generally require that the water content of the electrode be at the PPM level, so the packaging film must be able to block the infiltration of water vapor. Nylon is not waterproof and can not play a protective role. The metal Al reacts with oxygen in the air at room temperature to form a dense oxide film, resulting in water vapor that can not penetrate and protect the interior of the core. The Al layer also provides the plasticity of the punching pit when the aluminum plastic film is molded. See point 3 for details.

PP is an abbreviation for polypropylene. The property of this material is that it melts at a temperature of more than 100 degrees Celsius and has viscosity. Therefore, the heat encapsulation of the battery mainly depends on the PP layer being melted and bonded under the heat of the head, and then the head is removed, and the cooling temperature solidifies the adhesion.

Aluminum plastic film looks very simple, in fact, how to make the three layers of material evenly, firmly together is not so easy to do. Unfortunately, the quality of aluminum plastic film is now basically imported from Japan, domestic is not without, but the quality still needs to be improved.

Aluminum plastic film forming process

The soft package core can be designed into different sizes according to the customer's needs. When the external dimensions are designed, corresponding molds need to be issued to form aluminum plastic membranes. The molding process is also known as the punching pit(in fact, I think it should be a "pit", but everyone writes it like this). As the name suggests, it is using a molding mold to heat up the aluminum plastic film. The pit that can load the core

Soft package electric core, in fact, the use of aluminum plastic packaging film as the packaging material of the electric core. Relatively speaking, the packaging of lithium-ion batteries is divided into two categories, one is the soft package core and the other is the metal shell core. Metal shell cores include steel shells and aluminum shells, etc.. In recent years, some electric cores with special needs have used plastic shells, which can also be classified as such.

The difference between the two apart from the shell material, determines that its packaging method is also different. The soft core is thermally packaged, while the metal shell core is generally welded(laser welding). The reason why the soft package core can be thermally packaged is that it uses aluminum plastic packaging film.

1, soft package core

The so-called soft package core is actually the use of aluminum plastic packaging film as the core of the packaging material. Relatively speaking, the packaging of lithium-ion batteries is divided into two categories, one is the soft package core and the other is the metal shell core. Metal shell cores include steel shells and aluminum shells, etc.. In recent years, some electric cores with special needs have used plastic shells, which can also be classified as such.

The difference between the two apart from the shell material, determines that its packaging method is also different. The soft core is thermally packaged, while the metal shell core is generally welded(laser welding). The reason why the soft package core can be thermally packaged is that it uses aluminum plastic packaging film.

The composition of aluminum plastic packaging film(referred to as aluminum plastic film) is shown in the figure. The cross section shows three layers of composition: nylon layer, Al layer and PP layer.

Each of the three layers has its own role. First, the nylon layer guarantees the shape of the aluminum plastic film and ensures that the film will not deform before the lithium ion battery is made.

The Al layer is a layer of metal Al that prevents water from infiltrating. Lithium-ion batteries are very afraid of water, and generally require that the water content of the electrode be at the PPM level, so the packaging film must be able to block the infiltration of water vapor. Nylon is not waterproof and can not play a protective role. The metal Al reacts with oxygen in the air at room temperature to form a dense oxide film, resulting in water vapor that can not penetrate and protect the interior of the core. The Al layer also provides the plasticity of the punching pit when the aluminum plastic film is molded. See point 3 for details.

PP is an abbreviation for polypropylene. The property of this material is that it melts at a temperature of more than 100 degrees Celsius and has viscosity. Therefore, the heat encapsulation of the battery mainly depends on the PP layer being melted and bonded under the heat of the head, and then the head is removed, and the cooling temperature solidifies the adhesion.

Aluminum plastic film looks very simple, in fact, how to make the three layers of material evenly, firmly together is not so easy to do. Unfortunately, the quality of aluminum plastic film is now basically imported from Japan, domestic is not without, but the quality still needs to be improved.

3, aluminum plastic film molding process

The soft package core can be designed into different sizes according to the customer's needs. When the external dimensions are designed, corresponding molds need to be issued to form aluminum plastic membranes. The molding process is also known as the punching pit(in fact, individuals think that it should be a "pit", but everyone writes it as usual). As the name implies, it is to use a molding mold to heat up the aluminum plastic film and rush out of it. The pit that can load the core,

The composition of aluminum plastic packaging film(referred to as aluminum plastic film) is shown in the figure. The cross section shows three layers of composition: nylon layer, Al layer and PP layer.

Each of the three layers has its own role. First, the nylon layer guarantees the shape of the aluminum plastic film and ensures that the film will not deform before the lithium ion battery is made.

The Al layer is a layer of metal Al that prevents water from infiltrating. Lithium-ion batteries are very afraid of water, and generally require that the water content of the electrode be at the PPM level, so the packaging film must be able to block the infiltration of water vapor. Nylon is not waterproof and can not play a protective role. The metal Al reacts with oxygen in the air at room temperature to form a dense oxide film, resulting in water vapor that can not penetrate and protect the interior of the core. The Al layer also provides the plasticity of the punching pit when the aluminum plastic film is molded. See point 3 for details.

PP is an abbreviation for polypropylene. The property of this material is that it melts at a temperature of more than 100 degrees Celsius and has viscosity. Therefore, the heat encapsulation of the battery mainly depends on the PP layer being melted and bonded under the heat of the head, and then the head is removed, and the cooling temperature solidifies the adhesion.

Aluminum plastic film looks very simple, in fact, how to make the three layers of material evenly, firmly together is not so easy to do. Unfortunately, the quality of aluminum plastic film is now basically imported from Japan, domestic is not without, but the quality still needs to be improved.

Aluminum plastic film forming process

The soft package core can be designed into different sizes according to the customer's needs. When the external dimensions are designed, corresponding molds need to be issued to form aluminum plastic membranes. The molding process is also known as the punching pit(in fact, I think it should be a "pit", but everyone writes it like this). As the name suggests, it is using a molding mold to heat up the aluminum plastic film. The pit that can load the core

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