1. Connect to the entire vehicle through a dedicated wiring harness. After disconnecting the dedicated wiring harness, the entire vehicle functions are complete, maintaining the integrity of all functions and wiring harnesses of the original vehicle.
2. The entire vehicle structure is complete, without damaging any wiring harness of the original vehicle, and all control systems, sensors, and actuators are complete and can operate normally.
3. The dynamic and static signal parameters of the entire vehicle can be displayed through the original instrument panel (such as energy monitor screen, speed, gear display, and various working condition indicator lights).
4. Through a dedicated junction box, it is connected in series with the original vehicle wiring harness, and the control signal is led out to the central control console for detection and fault setting. The outgoing interfaces are all the main control parts of the original vehicle, including vehicle controller VCU control unit, power battery management system BMS control unit, drive system three in one motor controller control unit, high-voltage three in one charging and distribution assembly control unit, automatic air conditioning management control unit, gear control unit, combination instrument control unit, gateway control unit, etc. After detecting the fault, connect the control signal back to the original vehicle control unit, with no less than 180 fault points. The plug is the same as the original vehicle wiring harness, and the connecting wire is made of national standard Teflon automotive special wire, with a withstand voltage of no less than 600V, to ensure the normal circuit signal of the entire vehicle. At the same time, the signal is led out from the center console to the teaching board, where the main control units and connector terminals of the original vehicle are drawn. Real time signals of the entire vehicle are directly measured on the terminals. The teaching board is 2.4 meters long, with a total of 2 measurement teaching boards, which can be used by 6 groups of students to simultaneously measure and master the variation rules of different control unit parameters.
5. The VCU control unit of the vehicle controller is led out to the teaching board, which can detect signals such as accelerator pedal, brake pedal, vacuum pressure sensor, brake vacuum booster pump, high-pressure water pump, infinite fan, etc.
6. The BMS control unit of the power battery management system is led out to the teaching board, and can detect signals such as DC charging port, AC charging port, and low-voltage wiring harness of the power battery pack.
7. The automatic air conditioning management control unit is led out to the teaching board and can detect signals including G21 (A), G21 (B), G21 (C), cold and warm circulation motor, inner and outer circulation motor, air outlet mode circulation motor, pressure sensor, driver's foot blowing channel sensor, driver's face blowing channel sensor, electronic expansion valve (air conditioning), pressure temperature sensor (air conditioning), sunlight intensity sensor, evaporator temperature sensor, outdoor temperature sensor, indoor temperature sensor, electronic expansion valve (battery thermal management), water temperature sensor, Four way water valve, etc.
8. Training bench is made of 4 mm advanced aluminum plate which is of corrosion resistance, impact resistance, anti-pollution, fire resistance and moisture resistance, the surface of which is processed with special spraying primer; the panel is printed with fadeless color control units, actuators, and sensor terminal diagrams and install gold-plated detection terminals. It allowing students to visually compare the circuit diagram and the original vehicle object, measure and analyze the working principle and signal transmission process of each control system.
9. The panel frame of the testing and training platform adopts a 2mm thick mold formed aluminum alloy frame structure. The base frame is made of aluminum alloy profiles, with the main material being 80 * 40 aluminum alloy profiles and insulated wooden boards laid on top. Four 3-inch wear-resistant nylon casters are installed at the bottom for flexible movement, and two casters are equipped with self-locking devices that can be fixed in position at any time.
10. Provide an electronic version of the original vehicle maintenance manual and circuit diagram to guide fault setting and troubleshooting.
1. Power battery
Original BYD Qin EV nickel cobalt manganese lithium ternary power battery. The total capacity of the power battery pack is 408.8V130AH (approximately 53.1 kWh), consisting of a total of 112 individual batteries connected in series. Adopting a distributed battery management system, consisting of one battery management controller (BMC), multiple battery information collectors (BICs), and one set of power battery sampling lines. The power battery adopts a battery liquid cooling and PTC heating system to adjust the temperature.
2. High voltage three in one charging and distribution assembly (including DC/DC converter, on-board charger OBC, and high voltage distribution box PDU)
Cooling method: water cooling
Control module: IGBT
Maximum output capacity: 180KW
Maximum output current: 270A
Protection level: IP67
OBC charging power: 6.6KW
OBC type: unidirectional, isolated
DC rated output voltage: 13.8V
DC rated output current: 145A
3. Three in one drive system (including drive motor, motor controller, and reducer)
Motor type: permanent magnet synchronous drive motor
Continuous power: not less than 35KW
Peak power: not less than 100KW
Continuous torque: 70N. m
Peak torque: 180N. m
Maximum speed: 12100rpm
Cooling method: water cooling
Transmission speed ratio: 10.7
4. Air conditioning and heating system:
Electric air conditioning, working voltage 408.8V
Electric PTC heating water circulation
5. Other parameters are as follows:
Vehicle body: approximately 4678mm in length. Width: 1770mm. Height: 1500mm. Wheelbase: 2670mm.
Front wheelbase: approximately 1525mm. Rear wheelbase: approximately 1520mm.
1. One online testing teaching aid vehicle (BYD Qin EV-2019 (3+3 platform) pure electric sedan).
2. One set of dedicated docking harness.
3. One complete fault setting and detection center console.
4. One complete vehicle inspection teaching board A, including a VCU control unit for the entire vehicle controller, a BMS control unit for power battery management, a three in one motor controller control unit for the drive system, and a control unit for the high-voltage three in one charging and distribution assembly. The size of the teaching board shall not be less than 2400 * 1200mm.
5. One complete vehicle testing board B, including automatic air conditioning management control unit, gear control unit, combination instrument control unit, gateway control unit testing, with a board size not less than 2400 * 1200mm.