Detailed explanation of the application of 18650 batteries in electric vehicles

1. The quality control of the 18650 and the reliability of the system technology make it unsuitable for mass application of lithium batteries in the field of passenger cars. Customization. According to the control ability of battery factories with good international manufacturing capabilities, the probability of battery failure is about ppb. If the passenger car is loaded with 100kWh Quantity, that is, one of 100,000 vehicles (a single battery is calculated at 10Wh) has a safety problem; if the control level of the ppm level is used, then one of the 100 vehicles has a failure probability, which is a very high probability of failure. This is only considering the control ability of the battery manufacturing process. Secondly, the battery system packaged by tens of thousands of 18650 batteries not only poses great challenges to the battery assembly technology, but also to the battery management technology, and the technical requirements are very high. It is undeniable that good assembly and management technology can make the problem battery controllable, that is, reduce the failure probability of the problem battery; otherwise, it will accelerate the deterioration of the battery and accelerate the failure rate of the problem battery. 2. The application of 18650 in mini-vehicles can achieve complementary lengths and shorts. The characteristics of mini-electric vehicles are small and flexible, but their cruising range is higher than that of traditional low-speed electric vehicles. These two mutually restrictive requirements put forward the adaptability of the battery. Relatively high requirements. The 18650 battery is characterized by high energy density and can achieve as much load as possible in a small space. The combination of these two small ones can realize the efficiency of the whole vehicle. This is one of them. Secondly, the power requirements of micro-electric vehicles are generally between 10-20kWh, and the demand for 18650 bicycles is generally between 1000-2000. This is not a big test for the assembly and connection of the battery system. There have been several in China. A very distinctive 18650 battery system integrator can meet the needs of customers; at the same time, because the number of serial connections is less than that of passenger cars, it is relatively easy to manage, and the technology of the management system is relatively mature. This is also an important guarantee that the 18650 can be used in mini-cars. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Preservation and maintenance instructions for lithium batteries