Technical Knowledge

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

The protection function of the lithium-ion battery is usually completed by the protection circuit board and the PTC. The protection board is composed of electronic components. It can accurately monitor the voltage of the battery cell and the current of the charging and discharging circuit at all times in the environment of -40 ° C ~ + 85 ° C, and timely Control the on-off of the current loop; the important use of PTC is to protect in high temperature environment to prevent the battery from burning, explosio

The three important links in the production of ternary cathode materials for lithium-ion batteries are abrasive mixing, high temperature sintering, and crushing and decomposition. The control of each link and the performance of the equipment will directly or indirectly affect the final product. Among them, grading, screening and packaging are the last links of ternary materials. Let's understand these links.(Lithium - Ion Battery Equipment) ●Grading The particle size distribution of ternary lithium-ion ba

1. Thickness There are two important on-line control technologies for lithium-ion battery separator thickness, one is MD (longitudinal) control and CD (transverse) control; the other is the on-line machine vision inspection technology of the separator. The so-called MD control and CD control refers to the closed-loop control of the thickness in the MD direction by controlling the speed of the feeding screw or the pulling speed; and the data measurement through the scanning frame, and finally the data closed-loop

The lithium battery equipment corresponding to the front-end process of lithium battery production mainly includes vacuum mixers, coating machines, roller presses, etc.; the middle-stage processes mainly include die-cutting machines, winding machines, lamination machines, liquid injection machines, etc.; The latter-stage process includes chemical forming machines , Volumetric testing equipment, process warehousing and logistics automation, etc. In addition, the production of battery packs requires Pack automation e

Prospects for multi-level utilization and recycling of power lithium batteries:     According to statistics, the cumulative sales of new energy vehicles in China in 2017 reached 1.8 million, and the market sales in 2018 are expected to be around 1 million. The service life of power batteries is generally 5 to 8 years. Starting in 2019, my country's power batteries will enter a large-scale obsolescence period. By 2020, the annual scrap volume of China's automotive power batteries is expe

Experts believe that these seven points are not only the buyers should pay attention to, but also the problems that the die-cutting machine must solve when manufacturing equipment. How to choose a die-cutting machine with high speed and high precision? Recently, Chai Sanzhong and Cheng Ganghu of Xi'an University of Technology and Zhang Xuansheng of Beijing Institute of Graphic Communication have provided answers to the industry. That is to say "seven looks".(High Speed Slitting Machine) Take a loo