Technical Knowledge

Lithium-ion battery separator dry single drawing process Feeding: raw materials such as PE or PP and additives are pretreated according to the formula, and then transported to the extrusion system. Casting: The pretreated raw materials are melted and plasticized in the extrusion system, and then extruded from the die, and the melt is casted to form a base film with a specific crystal structure. Heat treatment: After heat treatment of the base film, a hard elastic film is obtained.(Lithium - Ion Battery Equ

When the lithium-ion battery pack is produced and stored for a long time, due to the different static power consumption of each circuit of the protection board and the different self-discharge rate of each cell, the voltage of each string of batteries in the entire battery group is inconsistent. Balance has the function of balancing the voltage of the lithium-ion battery pack, so as to achieve the effect of full charge and full discharge of the battery pack capacity, so that the battery pack can exert the maximum e

The meaning of coating.Lithium - Ion Battery Equipment Slurry coating is the next process after the preparation of the slurry. The important purpose of this process is to uniformly coat the slurry with good stability, good viscosity and good fluidity on the positive and negative electrode current collectors. The pole piece coating is of great significance to the lithium-ion battery pack, which is mainly reflected in the following points: 1. It is of great significance to the capacity of the finished battery

Lithium titanate battery has the advantages of small size, light weight, high energy density, good sealing performance, no leakage, no memory effect, low self-discharge rate, rapid charge and discharge, long cycle life, wide working environment temperature range, safe and stable green It has the characteristics of environmental protection and so on, so it has a very wide application prospect in the field of communication power supply. When the lithium titanate battery is used as the negative electrode material,

(1) Special solvents and binders for pulping are mixed with powdered positive and negative active materials respectively, and after high-speed stirring evenly, slurry positive and negative materials are made. (2) Coating film The prepared slurry is uniformly coated on the surface of the metal foil and dried to form positive and negative electrode pieces respectively. (3) The assembly is placed in the top-down order of the positive electrode sheet-diaphragm-negative electrode sheet-diaphragm, and the battery p

1. Humidity control <1%RH Purpose: to prevent water absorption during the winding process of positive and negative electrode sheets, resulting in zero voltage, self-discharge, and poor cycle performance; Method: Calculate the dew point value and the temperature value to obtain the temperature and humidity value; 2. Dust control &le;100,000pc/ft3 (detection particle size is 0.5um) Purpose: to prevent the dust from being involved in the pole group during winding, resulting in short circuit, overheatin

When the lithium-ion battery voltage is higher than 3.0V, it enters the second stage, the high current constant current charging stage (CCFastcharge). Since the lithium-ion battery has been pre-charged in the first stage, its state has been relatively stable (the purpose of the pre-charge stage can be understood in this way~ but it is not rigorous). Therefore, in the second stage, the charging current can be appropriately increased. According to different batteries, the current can vary from 0.1C to several C, wher

Balanced charging technologies commonly used in the balance principle of lithium-ion battery protection boards include constant shunt resistance balance charging, on-off shunt resistance balance charging, average battery voltage balance charging, switched capacitor balance charging, step-down converter balance charging, inductance balance charging, etc. When charging a group of lithium-ion batteries in series, ensure that each battery is charged equally, otherwise the performance and life of the entire group of bat

Dry Process of Fe-Li-ion Battery Separator The dry process can be subdivided into a uniaxial stretching process and a biaxial stretching process. The dry uniaxial stretching process is to prepare a high-oriented polypropylene or polyethylene film with low crystallinity by producing hard elastic fibers, and obtain a film with high crystallinity during high temperature annealing. The film is first stretched at low temperature to form micro-defects, and then at high temperature, the defects are pulled apart to form