Nowadays, battery-powered vehicles are becoming more and more oriented towards the development trend of high-end intelligent systems. The R&D and production technology of battery car products is constantly developing, and the battery car processing technology is also improving day by day. But there is a drawback that has been holding back the development trend of battery cars, that is, rechargeable batteries!
With the promulgation of national standards, the lithium battery period has already come. There are three key types of lithium batteries for battery cars on the sales market, ternary lithium (the most used at this stage), the second lithium iron phosphate battery, and the third lithium titanate. So, what must be paid attention to in the application of lithium battery?
The first is temperature. Lithium batteries are afraid of high temperatures. Long-term in the natural environment of over-temperature, the service life of the lithium battery will be greatly reduced. The more serious one is caused by the expansion of gas pressure. It is caused by the high temperature of its office environment.
The second largest amount of current, for example, 18650 lithium battery is 3C charge and discharge, your battery car is 8000W, and the lithium battery used is less than the charge and discharge current of your battery car, which will cause the lithium battery temperature to be too high, the current is too large and the service life is reduced. Short, it will continue to be damaged. If your battery car has a very high output power and a very fast speed, it is recommended to choose a 18650 lithium battery with 10C current. It is obviously very important to choose a suitable lithium battery!
The third full-grid battery storage and discharge, the full-grid power of the ternary lithium battery is 4.35V. At this stage, the lithium battery protection boards currently on the market are all 4.2V until the battery is charged. Therefore, many people buy lithium batteries for battery cars and say that there is no tolerance. The large volume is actually for this reason. Generally, a long-term storage and discharge of lithium batteries fills up 50% of the TV set. For example, if you buy a new machine, many of them start up 20-50% of the electricity consumption. If the full battery is stored for a long time, the volume of the lithium battery will be reduced. In addition to lithium iron phosphate batteries and lithium titanate, these two types can be stored and discharged at full capacity. It is also necessary to pay attention to choosing a good quality lithium battery protection board. The big taboo of lithium batteries is overcharging and overdischarging. Lithium is damaged when it loses power, and the package is inevitably damaged by overshoot.
Fourth, suitable battery charging equipment. In the case of battery charging, the current of the charger and the general current load of high-power electrical appliances are within the required range. Excessive current load is very easy to cause internal short circuit of the rechargeable battery. Failure, and then destroy the lithium iron phosphate, causing a safety risk to the power circuit. The same applies to the working voltage of rechargeable chargers. Therefore, we should pay attention to whether the charger meets the standard when applying the charger.