What is the estimation method of battery SOC?

　　Author ：Iflowpower – Portable Power Station Supplier

Accurately estimate the battery SOC, on the one hand, from the requirements of electric vehicles, efficient management of the battery from the adequate play battery capacity and improve safety; on the other hand, the highly nonlinearity of the electric vehicle battery is expressed in the process of use. Accurately estimate SOC is very difficult. (1) Discharge Experiment Method The discharge test method is to continue the constant current discharge of the target battery until the cutoff voltage of the battery, multiply the time used by this discharge process in the magnitude of the discharge current, ie as the remaining capacity of the battery.

This method generally uses this method as a calibration of the battery SOC estimation or in the later maintenance of the battery, which is relatively simple and reliable without understanding the SOC value of the battery. (2) Ambarn metering method is also known as the current integral method, the safety point method, and the schedule of safety measures method are the discharge power of the battery in different currents, etc. It is a PEUKERT equation.

Ash Measurement Method Calculates the battery SOC is a relatively simple method. This method is only to pay attention to the external characteristics of the system. During the estimation process, only the power flowing and out of the battery.

(3) The open circuit voltage method is based on the change relationship between the open circuit voltage of the battery and the internal lithium ion concentration of the battery, and indirectly fits the corresponding relationship between the battery SOC. When the actual operation is performed, the battery is inexpensive to discharge at a fixed discharge magnification until the discharge is stopped, and the discharge process obtains the relationship curve between OCV and SOC according to the discharge process. (4) Neural network method neural network method is analog human brain and its neuron used to solve the new type of algorithm for nonlinear systems, and there is no need to study the internal structure of the battery.

It is only necessary to extract a large number of working characteristics from the target battery in advance. Enter the SOC value of the run from the output sample and enter it into the system established by using this Member.