1. Dismantling methods and inspection precautions for high-voltage DC lines of power batteries; 2. Understand the structure and physical components of pure electric vehicle power batteries (packs); 3. Components and circuits of power batteries and battery management systems and their functions: measurement, inspection, and maintenance methods for individual batteries; 4. Testing methods for positive pole contactors, negative pole contactors, and splitters; 5. Insulation testing methods for power battery packs; 6. Charging and discharging methods for power batteries; 7. The data changes of power batteries and the response principle of BMS: 8. Fault diagnosis of power battery module: 9. Maintenance and testing methods for power battery systems;
--Technical parameters-- 1. The power battery pack adopts lithium iron phosphate battery cells, natural air cooling, and collision prevention devices. Each battery cell is equipped with a temperature sensor, which can achieve six functions of BMS power-off, preparation, charging, discharging, protection, and communication, providing power for the entire vehicle drive system. The total capacity of the battery pack is 320V80AH, with an energy density of 86WHIKG and 100 individual units connected in series; The connection control relationship, installation position and operating parameters between the core components of the real star power battery pack, as well as safety precautions for high-voltage systems, cultivate students' ability to analyze and handle faults in lithium iron phosphate power battery packs, suitable for teaching and maintenance training of new energy pure electric courses in vocational and technical colleges. 2. The BMS information collection module collects information on the voltage, SOC, temperature, current, and battery management of a single battery cell, and transmits the information to the BMS main control module. The BMS battery management system is equipped with active balancing function, 4-way switch control protection (overvoltage, undervoltage, overcurrent, over temperature), and CAN communication with the charger. It controls the operation of the on-board charger through the BMS, estimates SOC and charging time, etc. The panel of the training platform is made of 4mm pan plastic plate, which can resist aging and corrosion. The panel shall be painted with the names of the components, technical parameters and working principle diagrams of the battery pack. 3. Dissect the battery pack casing, which is made of transparent 1.5mm acrylic board and installed on a 1.6mm insulated wooden board. The interior of the battery pack can be visually observed, and electronic devices such as battery cells, battery packs, control relays, fuses, splitters, current monitors, temperature sensors, smoke sensors, connector terminals, etc. can be clearly seen;
4. Structure and components: The equipment is required to be able to interact with pure electric vehicle drive system training platform, pure electric vehicle electric air conditioning training platform, pure electric vehicle electronic control power steering training platform, pure electric vehicle high-voltage control training platform, etc., to provide energy sources for interconnected devices.