Battery inspection instrument

Battery inspection instrument
Introduction
System structure
The system structure is roughly divided into acquisition module, central processing module and display module
The acquisition module collects basic parameters such as battery pack voltage, current and temperature in real time, central processing module The collected data is converted, analyzed, calculated and the calculation results are transmitted to the display module through the bus and uploaded through the serial port to achieve remote monitoring.
The principle structure diagram is as follows
Current sensor
Text box signal acquisition and data processing
Text box LCD text box displays keyboard and data communication



Text box keyboard temperature sensor






Text box network server


Temperature sensor




Working principle
Battery pack remaining power estimation
The remaining power is the battery application The most critical question is the question that users are most concerned about, and it is also the most complex and difficult to answer. Therefore, battery electrochemistry has been basically an experimental subject for many years.
Experts and scholars have conducted a large number of experiments on the differences in the physical and chemical properties of batteries of different manufacturers and types, on the dynamic changes in parameters such as internal temperature and internal resistance of batteries, and on the changing characteristics of voltage and current of batteries during charging and discharging. And tests summarized the rules about battery capacity characteristics.
The system first calculates the initial power of the battery pack based on the type of battery pack, rated capacity, service life, usage time, and the difference between the single cell characteristics and the average characteristics of the battery pack. During operation, the system then calculates the battery pack's initial power according to the battery cell voltage in different states. Changes in the total voltage of the battery pack, changes in ambient temperature, the internal resistance of the single cell, the size of the current during the charge and discharge process, and the charge and discharge time. After analysis and judgment, the battery with the worst performance is found and the estimated value of the remaining capacity of the battery pack is calculated through the remaining capacity model.
Diagnosis system
The diagnostic system includes the ranking of battery health levels and fault diagnosis. The consistency and difference of the basic characteristics of batteries are the basis for diagnosis and sorting. We also summarized the results based on the long-term use of batteries by expert battery maintenance personnel. Some practical rules, a large amount of empirical data and battery historical file information have established a mathematical model for sorting battery health levels and fault diagnosis.
Technical characteristics
Main functions
Real-time collection of single cell voltage
Real-time collection of battery pack voltage
Real-time collection of battery pack current
Real-time collection of battery pack ambient temperature
Automatically update the remaining power of the battery pack
Automatically determine the health level of individual batteries
Automatically prompt alarm information
Networked remote monitoring
Name
Number of channels
/> Test range
Measurement accuracy
Single voltage

Total voltage
Circuit

Current
Charge and discharge

Temperature
Road
℃℃
℃
Battery estimate

Health level
Level

Main technical indicators