Lithium battery type and capacity selection knowledge

Lithium battery type and capacity selection. First of all, we have to calculate the continuous current required by the battery based on our own motor power (to practice power, the general cycle speed corresponds to the corresponding practice power). For example, if the motor continues to run at 20 (1000w motor at 48v), the battery needs to be able to supply 20 current very low for a long period of time and the temperature rises (even if the temperature outside in summer is 35 degrees, the battery temperature should be controlled at 50 degrees). In addition, if the 48v current is 20a, the overvoltage should be doubled (96v, such as ecpulevel3), and the current should continue to be maintained at about 50a. If you like long-term overpressure use, please choose a battery that can continuously supply 50a current (or pay attention to temperature rise). The battery here continues to run on current instead of the manufacturer’s nominal battery discharge capacity. The nominal number of C (or hundreds of amperes) is the discharge capacity of the battery, and when the power is discharged at this current, the battery heating is very simple. If the heat is not properly dissipated, the battery life will be very short. (The battery environment used in our electric vehicles is battery stack discharge, no gaps, tight packaging, not to mention how to do forced air cooling). Our business environment is very bad. The discharge current of the battery should be reduced. Comment on the discharge current capacity of the battery by looking at the current temperature rise corresponding to the current battery. The only principle discussed here is the temperature rise of the battery during use (high temperature is the deadly enemy of lithium battery life). The battery temperature is best controlled below 50 degrees. (Preferably between 20 and 30 degrees). This also means that if it is a capacitive lithium battery (controlled under 0.5c discharge), the 20a continuous discharge current supply must be greater than the 40ah capacity (of course, the most important thing is to look at the internal resistance of the battery). If it is a power type lithium, it is normal to discharge according to 1C. Even the A123 ultra-low internal resistance power lithium battery is usually best discharged at 1C (no more than 2C is better, 2C discharge can only run for half an hour to be energized, not much use value). Factors such as the choice of the capacity of the car, the size of the storage space, the personal expense budget, and the size of the desired car's activity range. (Power lithium batteries generally require small capacity) 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: Explanation of important components of lithium battery electrolyte