Ten major processes of power lithium battery -Lithium - Ion Battery Equipment

Ten major processes of power lithium battery -Lithium - Ion Battery Equipment

The power battery is the power source that provides the power source for the tool, and mostly refers to the battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts. It differs mainly from starter batteries used for car engine starting. Valve-sealed lead-acid batteries, open tubular lead-acid batteries and lithium iron phosphate batteries are mostly used.

Power battery structure

1. Battery cover

2. The positive electrode --- the active material is lithium cobalt oxide

3. Diaphragm---a special composite membrane

4. The negative electrode --- the active material is carbon

5. Organic electrolyte

6. Battery case

Ten major production processes for automotive power batteries

Seven characteristics of power battery

1. Ultra-long life, the cycle life of long-life lead-acid batteries is about 300 times, and the maximum is 500 times, while the lithium iron phosphate power battery produced by Shandong Haiba Energy Group Co., Ltd. has a cycle life of more than 2,000 times, standard charging (5 hours rate) use, can reach 2000 times. The lead-acid battery of the same quality is "new half year, old half year, and maintenance and maintenance for half a year", which is 1~1.5 years at most, while lithium iron phosphate battery will reach 7-8 years when used under the same conditions. Taken together, the price-performance ratio will be more than 4 times that of lead-acid batteries.(Lithium - Ion Battery Equipment)

2. Safe to use, lithium iron phosphate completely solves the hidden safety problems of lithium cobaltate and lithium manganate. Lithium cobaltate and lithium manganate will explode under strong collisions, posing a threat to the life safety of consumers, while iron phosphate Lithium has undergone rigorous safety testing and will not explode even in the worst traffic accidents.

3. It can quickly charge and discharge at 2C with high current. Under the special charger, the battery can be fully charged within 40 minutes after charging at 1.5C, and the starting current can reach 2C, but lead-acid batteries do not have this performance now.

4. High temperature resistance, the electric heating peak of lithium iron phosphate can reach 350℃~500℃, while lithium manganate and lithium cobaltate are only around 200℃.

5. Large capacity.

6. No memory effect.

7. Small size and light weight.

Ten major production processes for automotive power batteries

Top ten production processes of automotive power batteries

The first process: positive and negative homogenization workshop

The function of this workshop is to fully mix the materials used for the positive and negative electrodes with the strictly calculated ratio in the homogenizer tank. In this process, dust must be strictly controlled to prevent the dust from affecting the consistency of the battery. The level of dust control Equivalent to medical grade.

The second process: coating workshop

The coating workshop will evenly attach the stirred slurry to the aluminum foil, and then suspend and dry it in an oven heated with special oil. The purpose is to prevent the slurry from flowing and ensure uniform adhesion. This is also an important link to ensure the consistency of the finished battery performance.

The third process: rolling workshop

In the rolling workshop, the aluminum foil attached with the positive and negative materials is rolled by a roller with a pressure of about 50 tons. On the one hand, the coated material is made tighter, the energy density is improved, and the thickness consistency is ensured. On the other hand Dust and humidity will also be further controlled. Unfortunately, because the thermal stability of domestic materials still has a certain gap with foreign materials, in order to ensure safety and achieve better performance, BAK currently uses imported raw materials.

The fourth process: positive and negative electrode cutting

The rolled aluminum foil is cut according to the size of the battery to be produced, and the generation of burrs (visible under the microscope) is fully controlled. The purpose of this is to prevent the burrs from piercing the diaphragm and causing serious safety hazards. The current slitting speed of the slitting workshop is 60 meters per minute.



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