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1. Preparation of solvent: Cyclic or chain esters such as EC, DEC, PC, DMC, etc. The earliest method for preparing EC was to use ethylene glycol and phosgene reaction, but this process flow factory has been eliminated due to low yield, high cost and serious pollution. The transesterification method is used to prepare EC, the reaction speed is improved, and the yield is also improved. 2, purification: Regarding the organic raw materials used, the purification treatment has reached the standard for the use of li

1. Add a parallel equalization circuit to each single cell of the lithium-ion battery pack to achieve the purpose of shunt. In this mode, when a battery reaches full charge first, the equalizer prevents it from overcharging and converts the excess energy into heat, continuing to charge the battery that is not fully charged. This method is simple, but it will cause energy loss and is not suitable for fast charging systems. 2. Before charging, discharge each cell one by one through the same load to the same level,

The gap between the upper and lower blades, the gap between the pressing plate and the punch, the pressure of the pressing plate and the flatness of the pressing plate surface are the major factors that affect the powder drop. To ensure the gap between the various parts of the mold, firstly, the mold material must be selected, and secondly, the machining accuracy must be ensured.        a: The gap between the upper and lower blades: When the gap is small, the punching force on the pole piece wi

Because of the slow construction speed of charging piles and the weak endurance of electric vehicles, new energy vehicles were once in a low development due to "overcapacity". Recently, as the State Council and the Ministry of Industry and Information Technology have successively promulgated preferential policies for supporting new energy vehicles, new energy vehicles have rekindled the fire of hope.      Just in the past October 22, the National Energy Conservation and New Energy Aut

The basic chemical principle of lithium-air battery is very simple. This kind of battery realizes discharge by combining lithium and oxygen to form lithium peroxide, and then completes charging by reversing this process by applying current. Recently, a research paper published in the journal Science showed that Clare Grey, a professor of chemistry at the University of Cambridge, and her team have overcome the technical difficulties in the development of lithium-air batteries, and the Cambridge team has overcome Som

The biggest difference between new energy vehicles and traditional vehicles is that they use batteries as power drives, so the technology of power lithium batteries is the core of new energy vehicles. What is the core technology of BMS? Recently, I saw a propaganda board of a domestic company, claiming to fully master BMS software and hardware technology, reaching the world's advanced level, and adopting multiple balanced control capabilities because of the use of the underlying software such as AUTOSAR&#

1. Lithium-ion battery material processing Some materials used in secondary batteries, such as lithium ions, require special treatment. Electrodes should be processed at high speed without damaging the fragile active material. In the electrolyte, special consideration is given to preventing the occurrence of precipitation and corrosive gases. 2. Cam unit If the machine is constructed with air cylinders or AC servo actuators with a takt time of less than 1 second, it is difficult to synchronize or maintain a st

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

In the past few decades, the continuous rapid development of human economic activities has led to a rapid increase in the demand for electricity. A solar cell is a semiconductor device that uses the photovoltaic effect to directly convert solar energy into electrical energy, which is easy to realize grid-connected power generation or as an independent energy source. As we all know, solar cell power generation has many advantages, such as safety and reliability, no noise, no pollution, energy can be obtained anywher