Manufacturing Method of Vacuum-filled Seal for Soft-pack Battery

Soft pack battery is another name for lithium-ion battery. Compared with lead-acid battery, it has many advantages. They are small size, light weight, high specific energy, high safety, flexible design and so on.

In the production process of the soft pack battery, before injecting the electrolyte, the main body of the soft pack battery needs to be dried. Because the separator in the main body of the soft pack battery is not resistant to high temperature.

Its drying temperature is not suitable to be too high. As we all know, under normal pressure, the evaporation temperature of water is above 100 ° C. And the separator in the main body of the soft battery is easily deteriorated above 90 ° C.  The battery performance will decrease, the capacity will decrease, and the defective rate will increase.

Reduced economic benefits.

Therefore, in the prior art, we need dry the main body of the soft pack.  Batteries under vacuum conditions, which can reduce the drying temperature. They avoid damage to the main body of the soft pack battery under high temperature conditions. And they reduce the defective rate.

In the prior art, when injecting the electrolyte into the dried flexible battery body (i.e., the battery cell). It is performed in a positive pressure and dry environment.

The process of Soft-pack Battery

The worker need to inject he trace moisture in the environment into the battery cell with the electrolyte. The excess moisture will reduce the performance of the battery. It will increase the rate of defective products. And it also  increases production costs. And it reduces economic benefits. And there is a need for improvement.

In order to overcome the above defects, we can provide an automatic production line for lithium batteries, an integrated production line. They include an oven, a cooling glove box, a liquid injection glove box. They also contain a buffer glove box, a squeeze (static) vacuum box, a sealed glove box and a discharge vacuum.

The workers connect the oven and the glove box to achieve continuous production.

After baking, the battery core is always kept in a water-free and oxygen-free glove box environment. The entire production line includes a cooling glove box. It has a fast cooling speed and low cost. It ensures the battery cells baked from filling to filling.

It operates the sealing process in a controlled anhydrous and oxygen-free environment. And  provides the most solid protection for the quality of the battery. It can realize the automatic production of batteries, greatly improve production efficiency. It can save human capital, and configure the MES manufacturing execution system to realize informatized production.

Customers do not need to build a drying room and purchase a rotary dehumidification system. It  saves investment costs and operating costs.

Effectively improve production efficiency, suitable for large-scale popularization and application.  In addition, the lithium battery automatic production line can realize full-automatic code scanning-injection-weighing-rehydration-sealing operation.  The super purification glove box can avoid moisture in the air.  As injecting the electrolyte into the cells, it guarantees the performance of the soft-pack battery.

And it reduce the defective rate,  the degree of automation is high, and it can improve the economic benefits.

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5V40A Battery Analyzer

Product introduction:

5V40A battery analyzer is mainly used for circle life testing and quality control in the production or experiment of batteries including lithium-ion batteries, lead-acid batteries, nickel-cadmium batteries, and quality test.

DHG-9000J 400 ℃ Blast Drying Box 71 liters

Product description:

DHG-9000J 400 ℃ blast drying box 71 liters This blast drying box is widely used in biochemical, chemical and pharmaceutical, medical and health, agricultural scientific research, environmental protection and other research and application fields. For drying of glassware, thermal denaturation and thermal hardening of samples, exclude residual moisture in specimens, dry heat sterilization of microorganisms with glassware, heat before heating, and hardening or softening of food and chemicals during heating, exclude Moisture, to extend the storage time of food under severe conditions and building materials, drying of electronic components and heat resistance experiments, baking, disinfection, sterilization and material denaturation experiments. The insulation material is made of alumina fiber with high purity. The shell is made of thick and high-quality Q235 steel plate sprayed with plastic. The instrument is equipped with a float flow meter to communicate with the atmosphere. The temperature control instrument uses a 28-segment program to control temperature.

Horizontal Planetary Mix

Product introduction:

Horizontal planetary mixing SFM series planetary ball mill is equipped with four mixing tanks on a turntable. When the turntable rotates, the central axis of the mixing tank performs planetary movement, and the grinding balls in the tank are ground and milled at high speed Mix the samples. The product can be pulverized and mixed with two methods, dry and wet, with different particle sizes and different materials. The smallest particle size of the ground product can be reached (1.0 × 10-4mm). Widely used in geology, minerals, metallurgy, electronics, building materials, ceramics, chemical industry, light industry, medicine, environmental protection and other departments.

MSK-115A-L Secondary Vacuum Final Sealer


Product introduction:

MSK-115A-L secondary vacuum final sealing machine can be applied to the vacuum pre-sealing and secondary vacuum final sealing processes of flexible packaging lithium batteries. This machine is compact in design, can be placed in the glove box for operation, and can realize many functions such as vacuuming, piercing and draining, heating and sealing. The working chamber of the equipment maintains a good degree of vacuum, excellent sealing effect, and good battery flatness.

MSK-116A, 117A, 118A Pouch Battery Pneumatic Folding Machine

Product introduction:

MSK-116A, 117A, 118A Pouch Battery Pneumatic Folding Machine Pouch Battery Pneumatic Folding Machine is a device for hemming and shaping of aluminum-plastic film of lithium ion soft-pack battery. Side, beautify the external shape of the battery.

MSK-120L Aluminum Plastic Film Forming Machine

Product introduction:

MSK-120L aluminum plastic film forming machine is a device developed by Kejing Company for the application of aluminum ion plastic film forming for lithium ion soft pack batteries. The device is driven by a pressurized cylinder, which can be used to form the aluminum-plastic film shells of different sizes for the lithium-ion battery.

MSK-140L Single Station Heat Sealer

Product introduction:

MSK-140L single station heat sealer is a heating type sealing device applied to the top and side of flexible packaging lithium ion batteries developed by Kejing Company. The device heats the head by resistance to make the aluminum plastic film weld under the set pressure.

MSK-320A Pneumatic Precision Spot Welder

Product introduction:

MSK-320A Inverter Pneumatic Spot Welder is a cylinder-driven AC pulse welding machine, which can be applied to the welding process of nickel-metal hydride, nickel-chromium and various lithium-ion batteries.

MSK-320B Pedal Precision Spot Welder

Product introduction:

MSK-320B inverter foot spot welding machine is a cylinder-driven AC pulse welding machine, which can be applied to the welding process of nickel metal hydride, nickel chromium and various lithium ion batteries.

MSK-TE9002 Needle Punching Tester

Product introduction:

MSK-TE9002 Battery Needle Puncture Tester is a device that can be applied to the safety test of lithium ion batteries and battery packs. It can realize the safety performance of the battery when the battery is punctured by a steel needle at normal temperature. It can be monitored during the test Battery surface temperature.

MSK-TE901 Temperature-controlled Battery External Short-circuit Tester

Product introduction:

MSK-TE901 temperature-controlled battery external short-circuit tester is a device that can be applied to the external short-circuit test process of lithium-ion batteries. The device consists of a short-circuit control unit and a temperature-controlled explosion-proof box. While detecting and recording the surface temperature of the battery, it can complete external short-circuit tests of lithium batteries in two different states, room temperature and high temperature, and meet various battery safety test standards at home and abroad.

MSK-TE902 Battery Impact Tester

Product introduction:

The MSK-TE902 battery heavy object impact tester is a device that can be applied to the safety test of lithium-ion batteries and battery packs. It can simulate the safety performance of the battery when the battery is impacted by a heavy object. A 10Kg or 9.1Kg weight is designed to fall freely at a height of 1m or 610mm, and hit a metal rod with a diameter of 15.8mm (5/8 inches). Press the battery cell sample vertically below the metal rod.

MSK-TE903 Battery Overcharge Overdischarge Explosion-proof Box

product description:

MSK-TE903 explosion-proof box can be used for lithium-ion battery over-charge and over-discharge testing and storage to prevent unnecessary damage caused by battery burning or explosion. The equipment adopts metal frame design, double-layer sheet metal structure, strong texture and good explosion-proof effect.